Home / 128,746.32-177,634.71-77,042.61

Finding the Fourth Proportional to 128,746.32, 177,634.71 and 77,042.61

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Solution

The fourth proportional to 128,746.32, 177,634.71 and 77,042.61 is: 106,297.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,746.32 : 177,634.71 = 77,042.61 : x
  2. Step 2: Convert to fraction form
    128,746.32/177,634.71 = 77,042.61/x
  3. Step 3: Cross multiply
    128,746.32x = 177,634.71 × 77,042.61
  4. Step 4: Simplify right side
    128,746.32x = 13,685,440,485.67
  5. Step 5: Solve for x
    x = 13,685,440,485.67/128,746.32
  6. Step 6: Final answer
    x = 106,297.72

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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.