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Finding the Fourth Proportional to 86,812.60, 129,873.30 and 75,254.20

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Solution

The fourth proportional to 86,812.60, 129,873.30 and 75,254.20 is: 112,581.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,812.60 : 129,873.30 = 75,254.20 : x
  2. Step 2: Convert to fraction form
    86,812.60/129,873.30 = 75,254.20/x
  3. Step 3: Cross multiply
    86,812.60x = 129,873.30 × 75,254.20
  4. Step 4: Simplify right side
    86,812.60x = 9,773,511,292.86
  5. Step 5: Solve for x
    x = 9,773,511,292.86/86,812.60
  6. Step 6: Final answer
    x = 112,581.71

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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.