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Finding the Fourth Proportional to 86,260.82, 129,391.15 and 38,820.46

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Solution

The fourth proportional to 86,260.82, 129,391.15 and 38,820.46 is: 58,230.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,260.82 : 129,391.15 = 38,820.46 : x
  2. Step 2: Convert to fraction form
    86,260.82/129,391.15 = 38,820.46/x
  3. Step 3: Cross multiply
    86,260.82x = 129,391.15 × 38,820.46
  4. Step 4: Simplify right side
    86,260.82x = 5,023,023,962.93
  5. Step 5: Solve for x
    x = 5,023,023,962.93/86,260.82
  6. Step 6: Final answer
    x = 58,230.65

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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.