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Finding the Fourth Proportional to 287,672.60, 431,573.70 and 88,002.20

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Solution

The fourth proportional to 287,672.60, 431,573.70 and 88,002.20 is: 132,023.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,672.60 : 431,573.70 = 88,002.20 : x
  2. Step 2: Convert to fraction form
    287,672.60/431,573.70 = 88,002.20/x
  3. Step 3: Cross multiply
    287,672.60x = 431,573.70 × 88,002.20
  4. Step 4: Simplify right side
    287,672.60x = 37,979,435,062.14
  5. Step 5: Solve for x
    x = 37,979,435,062.14/287,672.60
  6. Step 6: Final answer
    x = 132,023.12

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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.