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Finding the Fourth Proportional to 159,510.78, 239,705.70 and 84,687

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Solution

The fourth proportional to 159,510.78, 239,705.70 and 84,687 is: 127,263.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,510.78 : 239,705.70 = 84,687 : x
  2. Step 2: Convert to fraction form
    159,510.78/239,705.70 = 84,687/x
  3. Step 3: Cross multiply
    159,510.78x = 239,705.70 × 84,687
  4. Step 4: Simplify right side
    159,510.78x = 20,299,956,615.90
  5. Step 5: Solve for x
    x = 20,299,956,615.90/159,510.78
  6. Step 6: Final answer
    x = 127,263.85

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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.