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Finding the Fourth Proportional to 87,242.66, 130,876.23 and 42,871.16

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Solution

The fourth proportional to 87,242.66, 130,876.23 and 42,871.16 is: 64,312.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,242.66 : 130,876.23 = 42,871.16 : x
  2. Step 2: Convert to fraction form
    87,242.66/130,876.23 = 42,871.16/x
  3. Step 3: Cross multiply
    87,242.66x = 130,876.23 × 42,871.16
  4. Step 4: Simplify right side
    87,242.66x = 5,610,815,796.53
  5. Step 5: Solve for x
    x = 5,610,815,796.53/87,242.66
  6. Step 6: Final answer
    x = 64,312.75

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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.