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Finding the Fourth Proportional to 127,640.61, 191,520.45 and 48,728.79

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Solution

The fourth proportional to 127,640.61, 191,520.45 and 48,728.79 is: 73,115.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,640.61 : 191,520.45 = 48,728.79 : x
  2. Step 2: Convert to fraction form
    127,640.61/191,520.45 = 48,728.79/x
  3. Step 3: Cross multiply
    127,640.61x = 191,520.45 × 48,728.79
  4. Step 4: Simplify right side
    127,640.61x = 9,332,559,788.76
  5. Step 5: Solve for x
    x = 9,332,559,788.76/127,640.61
  6. Step 6: Final answer
    x = 73,115.91

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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.