Home / 131,431.90-197,147.85-86,331.10

Finding the Fourth Proportional to 131,431.90, 197,147.85 and 86,331.10

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Solution

The fourth proportional to 131,431.90, 197,147.85 and 86,331.10 is: 129,496.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,431.90 : 197,147.85 = 86,331.10 : x
  2. Step 2: Convert to fraction form
    131,431.90/197,147.85 = 86,331.10/x
  3. Step 3: Cross multiply
    131,431.90x = 197,147.85 × 86,331.10
  4. Step 4: Simplify right side
    131,431.90x = 17,019,990,753.14
  5. Step 5: Solve for x
    x = 17,019,990,753.14/131,431.90
  6. Step 6: Final answer
    x = 129,496.65

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Similar ratio
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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.