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Finding the Fourth Proportional to 151,332.48, 208,828.80 and 87,658.92

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Solution

The fourth proportional to 151,332.48, 208,828.80 and 87,658.92 is: 120,963.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,332.48 : 208,828.80 = 87,658.92 : x
  2. Step 2: Convert to fraction form
    151,332.48/208,828.80 = 87,658.92/x
  3. Step 3: Cross multiply
    151,332.48x = 208,828.80 × 87,658.92
  4. Step 4: Simplify right side
    151,332.48x = 18,305,707,072.90
  5. Step 5: Solve for x
    x = 18,305,707,072.90/151,332.48
  6. Step 6: Final answer
    x = 120,963.50

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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.