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Finding the Fourth Proportional to 84,330.90, 126,350.55 and 39,861.90

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Solution

The fourth proportional to 84,330.90, 126,350.55 and 39,861.90 is: 59,723.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,330.90 : 126,350.55 = 39,861.90 : x
  2. Step 2: Convert to fraction form
    84,330.90/126,350.55 = 39,861.90/x
  3. Step 3: Cross multiply
    84,330.90x = 126,350.55 × 39,861.90
  4. Step 4: Simplify right side
    84,330.90x = 5,036,572,989.05
  5. Step 5: Solve for x
    x = 5,036,572,989.05/84,330.90
  6. Step 6: Final answer
    x = 59,723.93

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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.