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Finding the Fourth Proportional to 87,399, 120,655.98 and 58,868.64

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Solution

The fourth proportional to 87,399, 120,655.98 and 58,868.64 is: 81,269.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,399 : 120,655.98 = 58,868.64 : x
  2. Step 2: Convert to fraction form
    87,399/120,655.98 = 58,868.64/x
  3. Step 3: Cross multiply
    87,399x = 120,655.98 × 58,868.64
  4. Step 4: Simplify right side
    87,399x = 7,102,853,450.47
  5. Step 5: Solve for x
    x = 7,102,853,450.47/87,399
  6. Step 6: Final answer
    x = 81,269.28

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1.5x scale

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.