Home / 90,861.12-136,080-87,708.24

Finding the Fourth Proportional to 90,861.12, 136,080 and 87,708.24

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Solution

The fourth proportional to 90,861.12, 136,080 and 87,708.24 is: 131,358.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,861.12 : 136,080 = 87,708.24 : x
  2. Step 2: Convert to fraction form
    90,861.12/136,080 = 87,708.24/x
  3. Step 3: Cross multiply
    90,861.12x = 136,080 × 87,708.24
  4. Step 4: Simplify right side
    90,861.12x = 11,935,337,299.20
  5. Step 5: Solve for x
    x = 11,935,337,299.20/90,861.12
  6. Step 6: Final answer
    x = 131,358.03

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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.