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Finding the Fourth Proportional to 287,687.94, 431,516.25 and 88,008.32

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Solution

The fourth proportional to 287,687.94, 431,516.25 and 88,008.32 is: 132,007.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,687.94 : 431,516.25 = 88,008.32 : x
  2. Step 2: Convert to fraction form
    287,687.94/431,516.25 = 88,008.32/x
  3. Step 3: Cross multiply
    287,687.94x = 431,516.25 × 88,008.32
  4. Step 4: Simplify right side
    287,687.94x = 37,977,018,057.62
  5. Step 5: Solve for x
    x = 37,977,018,057.62/287,687.94
  6. Step 6: Final answer
    x = 132,007.68

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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.