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Finding the Fourth Proportional to 85,449.87, 128,200.76 and 60,538.12

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Solution

The fourth proportional to 85,449.87, 128,200.76 and 60,538.12 is: 90,825.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,449.87 : 128,200.76 = 60,538.12 : x
  2. Step 2: Convert to fraction form
    85,449.87/128,200.76 = 60,538.12/x
  3. Step 3: Cross multiply
    85,449.87x = 128,200.76 × 60,538.12
  4. Step 4: Simplify right side
    85,449.87x = 7,761,032,992.97
  5. Step 5: Solve for x
    x = 7,761,032,992.97/85,449.87
  6. Step 6: Final answer
    x = 90,825.57

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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.