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Finding the Fourth Proportional to 87,061.68, 130,417.54 and 45,421.20

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Solution

The fourth proportional to 87,061.68, 130,417.54 and 45,421.20 is: 68,040.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,061.68 : 130,417.54 = 45,421.20 : x
  2. Step 2: Convert to fraction form
    87,061.68/130,417.54 = 45,421.20/x
  3. Step 3: Cross multiply
    87,061.68x = 130,417.54 × 45,421.20
  4. Step 4: Simplify right side
    87,061.68x = 5,923,721,167.85
  5. Step 5: Solve for x
    x = 5,923,721,167.85/87,061.68
  6. Step 6: Final answer
    x = 68,040.51

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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.