Home / 87,617.70-131,426.55-66,881.70

Finding the Fourth Proportional to 87,617.70, 131,426.55 and 66,881.70

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Solution

The fourth proportional to 87,617.70, 131,426.55 and 66,881.70 is: 100,322.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,617.70 : 131,426.55 = 66,881.70 : x
  2. Step 2: Convert to fraction form
    87,617.70/131,426.55 = 66,881.70/x
  3. Step 3: Cross multiply
    87,617.70x = 131,426.55 × 66,881.70
  4. Step 4: Simplify right side
    87,617.70x = 8,790,031,089.14
  5. Step 5: Solve for x
    x = 8,790,031,089.14/87,617.70
  6. Step 6: Final answer
    x = 100,322.55

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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.