Home / 87,431.20-131,146.80-68,404.30

Finding the Fourth Proportional to 87,431.20, 131,146.80 and 68,404.30

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Solution

The fourth proportional to 87,431.20, 131,146.80 and 68,404.30 is: 102,606.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,431.20 : 131,146.80 = 68,404.30 : x
  2. Step 2: Convert to fraction form
    87,431.20/131,146.80 = 68,404.30/x
  3. Step 3: Cross multiply
    87,431.20x = 131,146.80 × 68,404.30
  4. Step 4: Simplify right side
    87,431.20x = 8,971,005,051.24
  5. Step 5: Solve for x
    x = 8,971,005,051.24/87,431.20
  6. Step 6: Final answer
    x = 102,606.45

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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.