Home / 287,821.26-431,732.93-88,140.78

Finding the Fourth Proportional to 287,821.26, 431,732.93 and 88,140.78

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Solution

The fourth proportional to 287,821.26, 431,732.93 and 88,140.78 is: 132,211.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,821.26 : 431,732.93 = 88,140.78 : x
  2. Step 2: Convert to fraction form
    287,821.26/431,732.93 = 88,140.78/x
  3. Step 3: Cross multiply
    287,821.26x = 431,732.93 × 88,140.78
  4. Step 4: Simplify right side
    287,821.26x = 38,053,276,761.18
  5. Step 5: Solve for x
    x = 38,053,276,761.18/287,821.26
  6. Step 6: Final answer
    x = 132,211.49

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.