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Finding the Fourth Proportional to 87,498.79, 120,757.40 and 53,529.90

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Solution

The fourth proportional to 87,498.79, 120,757.40 and 53,529.90 is: 73,876.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,498.79 : 120,757.40 = 53,529.90 : x
  2. Step 2: Convert to fraction form
    87,498.79/120,757.40 = 53,529.90/x
  3. Step 3: Cross multiply
    87,498.79x = 120,757.40 × 53,529.90
  4. Step 4: Simplify right side
    87,498.79x = 6,464,131,546.26
  5. Step 5: Solve for x
    x = 6,464,131,546.26/87,498.79
  6. Step 6: Final answer
    x = 73,876.81

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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.