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Finding the Fourth Proportional to 80,424.92, 120,665.64 and 36,047.72

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Solution

The fourth proportional to 80,424.92, 120,665.64 and 36,047.72 is: 54,084.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,424.92 : 120,665.64 = 36,047.72 : x
  2. Step 2: Convert to fraction form
    80,424.92/120,665.64 = 36,047.72/x
  3. Step 3: Cross multiply
    80,424.92x = 120,665.64 × 36,047.72
  4. Step 4: Simplify right side
    80,424.92x = 4,349,721,204.34
  5. Step 5: Solve for x
    x = 4,349,721,204.34/80,424.92
  6. Step 6: Final answer
    x = 54,084.25

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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.