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Finding the Fourth Proportional to 87,330.28, 120,480.79 and 55,054.28

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Solution

The fourth proportional to 87,330.28, 120,480.79 and 55,054.28 is: 75,952.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,330.28 : 120,480.79 = 55,054.28 : x
  2. Step 2: Convert to fraction form
    87,330.28/120,480.79 = 55,054.28/x
  3. Step 3: Cross multiply
    87,330.28x = 120,480.79 × 55,054.28
  4. Step 4: Simplify right side
    87,330.28x = 6,632,982,269.61
  5. Step 5: Solve for x
    x = 6,632,982,269.61/87,330.28
  6. Step 6: Final answer
    x = 75,952.84

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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.