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Finding the Fourth Proportional to 86,581.90, 129,876.90 and 27,422.20

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Solution

The fourth proportional to 86,581.90, 129,876.90 and 27,422.20 is: 41,134.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,581.90 : 129,876.90 = 27,422.20 : x
  2. Step 2: Convert to fraction form
    86,581.90/129,876.90 = 27,422.20/x
  3. Step 3: Cross multiply
    86,581.90x = 129,876.90 × 27,422.20
  4. Step 4: Simplify right side
    86,581.90x = 3,561,510,327.18
  5. Step 5: Solve for x
    x = 3,561,510,327.18/86,581.90
  6. Step 6: Final answer
    x = 41,134.58

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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.