Home / 128,309,709.85-177,070,881.28-72,563,466.51

Finding the Fourth Proportional to 128,309,709.85, 177,070,881.28 and 72,563,466.51

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Solution

The fourth proportional to 128,309,709.85, 177,070,881.28 and 72,563,466.51 is: 100,139,552.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,309,709.85 : 177,070,881.28 = 72,563,466.51 : x
  2. Step 2: Convert to fraction form
    128,309,709.85/177,070,881.28 = 72,563,466.51/x
  3. Step 3: Cross multiply
    128,309,709.85x = 177,070,881.28 × 72,563,466.51
  4. Step 4: Simplify right side
    128,309,709.85x = 12,848,876,963,114,554
  5. Step 5: Solve for x
    x = 12,848,876,963,114,554/128,309,709.85
  6. Step 6: Final answer
    x = 100,139,552.79

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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.