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Finding the Fourth Proportional to 287,720.72, 431,563.08 and 88,025.30

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Solution

The fourth proportional to 287,720.72, 431,563.08 and 88,025.30 is: 132,032.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,720.72 : 431,563.08 = 88,025.30 : x
  2. Step 2: Convert to fraction form
    287,720.72/431,563.08 = 88,025.30/x
  3. Step 3: Cross multiply
    287,720.72x = 431,563.08 × 88,025.30
  4. Step 4: Simplify right side
    287,720.72x = 37,988,469,585.92
  5. Step 5: Solve for x
    x = 37,988,469,585.92/287,720.72
  6. Step 6: Final answer
    x = 132,032.44

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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.