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Finding the Fourth Proportional to 86,281.52, 129,287.62 and 54,624.56

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Solution

The fourth proportional to 86,281.52, 129,287.62 and 54,624.56 is: 81,851.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,281.52 : 129,287.62 = 54,624.56 : x
  2. Step 2: Convert to fraction form
    86,281.52/129,287.62 = 54,624.56/x
  3. Step 3: Cross multiply
    86,281.52x = 129,287.62 × 54,624.56
  4. Step 4: Simplify right side
    86,281.52x = 7,062,279,355.95
  5. Step 5: Solve for x
    x = 7,062,279,355.95/86,281.52
  6. Step 6: Final answer
    x = 81,851.59

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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.