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Finding the Fourth Proportional to 254,658.92, 381,750.95 and 86,061.35

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Solution

The fourth proportional to 254,658.92, 381,750.95 and 86,061.35 is: 129,011.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    254,658.92 : 381,750.95 = 86,061.35 : x
  2. Step 2: Convert to fraction form
    254,658.92/381,750.95 = 86,061.35/x
  3. Step 3: Cross multiply
    254,658.92x = 381,750.95 × 86,061.35
  4. Step 4: Simplify right side
    254,658.92x = 32,854,003,290.31
  5. Step 5: Solve for x
    x = 32,854,003,290.31/254,658.92
  6. Step 6: Final answer
    x = 129,011.79

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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.