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Finding the Fourth Proportional to 159,487.60, 239,231.40 and 109,721.20

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Solution

The fourth proportional to 159,487.60, 239,231.40 and 109,721.20 is: 164,581.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,487.60 : 239,231.40 = 109,721.20 : x
  2. Step 2: Convert to fraction form
    159,487.60/239,231.40 = 109,721.20/x
  3. Step 3: Cross multiply
    159,487.60x = 239,231.40 × 109,721.20
  4. Step 4: Simplify right side
    159,487.60x = 26,248,756,285.68
  5. Step 5: Solve for x
    x = 26,248,756,285.68/159,487.60
  6. Step 6: Final answer
    x = 164,581.80

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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.