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Finding the Fourth Proportional to 159,136.48, 219,603.31 and 87,516.28

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Solution

The fourth proportional to 159,136.48, 219,603.31 and 87,516.28 is: 120,769.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,136.48 : 219,603.31 = 87,516.28 : x
  2. Step 2: Convert to fraction form
    159,136.48/219,603.31 = 87,516.28/x
  3. Step 3: Cross multiply
    159,136.48x = 219,603.31 × 87,516.28
  4. Step 4: Simplify right side
    159,136.48x = 19,218,864,766.89
  5. Step 5: Solve for x
    x = 19,218,864,766.89/159,136.48
  6. Step 6: Final answer
    x = 120,769.70

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.