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Finding the Fourth Proportional to 243,990.72, 366,004.80 and 84,000.96

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Solution

The fourth proportional to 243,990.72, 366,004.80 and 84,000.96 is: 126,007.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,990.72 : 366,004.80 = 84,000.96 : x
  2. Step 2: Convert to fraction form
    243,990.72/366,004.80 = 84,000.96/x
  3. Step 3: Cross multiply
    243,990.72x = 366,004.80 × 84,000.96
  4. Step 4: Simplify right side
    243,990.72x = 30,744,754,564.61
  5. Step 5: Solve for x
    x = 30,744,754,564.61/243,990.72
  6. Step 6: Final answer
    x = 126,007.88

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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.