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Finding the Fourth Proportional to 87,925.80, 131,888.70 and 84,086.40

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Solution

The fourth proportional to 87,925.80, 131,888.70 and 84,086.40 is: 126,129.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,925.80 : 131,888.70 = 84,086.40 : x
  2. Step 2: Convert to fraction form
    87,925.80/131,888.70 = 84,086.40/x
  3. Step 3: Cross multiply
    87,925.80x = 131,888.70 × 84,086.40
  4. Step 4: Simplify right side
    87,925.80x = 11,090,045,983.68
  5. Step 5: Solve for x
    x = 11,090,045,983.68/87,925.80
  6. Step 6: Final answer
    x = 126,129.60

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1.5x scale

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.