Home / 128,531.52-177,348.29-80,757.19

Finding the Fourth Proportional to 128,531.52, 177,348.29 and 80,757.19

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Solution

The fourth proportional to 128,531.52, 177,348.29 and 80,757.19 is: 111,429.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,531.52 : 177,348.29 = 80,757.19 : x
  2. Step 2: Convert to fraction form
    128,531.52/177,348.29 = 80,757.19/x
  3. Step 3: Cross multiply
    128,531.52x = 177,348.29 × 80,757.19
  4. Step 4: Simplify right side
    128,531.52x = 14,322,149,551.71
  5. Step 5: Solve for x
    x = 14,322,149,551.71/128,531.52
  6. Step 6: Final answer
    x = 111,429.08

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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.