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Finding the Fourth Proportional to 159,861.60, 239,769.72 and 54,665.28

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Solution

The fourth proportional to 159,861.60, 239,769.72 and 54,665.28 is: 81,990.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,861.60 : 239,769.72 = 54,665.28 : x
  2. Step 2: Convert to fraction form
    159,861.60/239,769.72 = 54,665.28/x
  3. Step 3: Cross multiply
    159,861.60x = 239,769.72 × 54,665.28
  4. Step 4: Simplify right side
    159,861.60x = 13,107,078,879.32
  5. Step 5: Solve for x
    x = 13,107,078,879.32/159,861.60
  6. Step 6: Final answer
    x = 81,990.16

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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.