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Finding the Fourth Proportional to 87,417.80, 131,126.70 and 45,859.40

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Solution

The fourth proportional to 87,417.80, 131,126.70 and 45,859.40 is: 68,789.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,417.80 : 131,126.70 = 45,859.40 : x
  2. Step 2: Convert to fraction form
    87,417.80/131,126.70 = 45,859.40/x
  3. Step 3: Cross multiply
    87,417.80x = 131,126.70 × 45,859.40
  4. Step 4: Simplify right side
    87,417.80x = 6,013,391,785.98
  5. Step 5: Solve for x
    x = 6,013,391,785.98/87,417.80
  6. Step 6: Final answer
    x = 68,789.10

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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.