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Finding the Fourth Proportional to 159,472.80, 239,468.40 and 115,408.80

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Solution

The fourth proportional to 159,472.80, 239,468.40 and 115,408.80 is: 173,300.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,472.80 : 239,468.40 = 115,408.80 : x
  2. Step 2: Convert to fraction form
    159,472.80/239,468.40 = 115,408.80/x
  3. Step 3: Cross multiply
    159,472.80x = 239,468.40 × 115,408.80
  4. Step 4: Simplify right side
    159,472.80x = 27,636,760,681.92
  5. Step 5: Solve for x
    x = 27,636,760,681.92/159,472.80
  6. Step 6: Final answer
    x = 173,300.78

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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.