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Finding the Fourth Proportional to 287,680.60, 431,585.70 and 88,010.20

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Solution

The fourth proportional to 287,680.60, 431,585.70 and 88,010.20 is: 132,035.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,680.60 : 431,585.70 = 88,010.20 : x
  2. Step 2: Convert to fraction form
    287,680.60/431,585.70 = 88,010.20/x
  3. Step 3: Cross multiply
    287,680.60x = 431,585.70 × 88,010.20
  4. Step 4: Simplify right side
    287,680.60x = 37,983,943,774.14
  5. Step 5: Solve for x
    x = 37,983,943,774.14/287,680.60
  6. Step 6: Final answer
    x = 132,035.12

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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.