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Finding the Fourth Proportional to 123,644.02, 185,502.99 and 87,689.74

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Solution

The fourth proportional to 123,644.02, 185,502.99 and 87,689.74 is: 131,560.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,644.02 : 185,502.99 = 87,689.74 : x
  2. Step 2: Convert to fraction form
    123,644.02/185,502.99 = 87,689.74/x
  3. Step 3: Cross multiply
    123,644.02x = 185,502.99 × 87,689.74
  4. Step 4: Simplify right side
    123,644.02x = 16,266,708,962.32
  5. Step 5: Solve for x
    x = 16,266,708,962.32/123,644.02
  6. Step 6: Final answer
    x = 131,560.82

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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.