Home / 117,002,176,429.92-161,512,435,139.04-78,991,872,185.76

Finding the Fourth Proportional to 117,002,176,429.92, 161,512,435,139.04 and 78,991,872,185.76

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Solution

The fourth proportional to 117,002,176,429.92, 161,512,435,139.04 and 78,991,872,185.76 is: 109,042,156,498.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,002,176,429.92 : 161,512,435,139.04 = 78,991,872,185.76 : x
  2. Step 2: Convert to fraction form
    117,002,176,429.92/161,512,435,139.04 = 78,991,872,185.76/x
  3. Step 3: Cross multiply
    117,002,176,429.92x = 161,512,435,139.04 × 78,991,872,185.76
  4. Step 4: Simplify right side
    117,002,176,429.92x = 12,758,169,632,913,898,864,640
  5. Step 5: Solve for x
    x = 12,758,169,632,913,898,864,640/117,002,176,429.92
  6. Step 6: Final answer
    x = 109,042,156,498.31

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.