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Finding the Fourth Proportional to 85,662.13, 128,523.62 and 38,272.88

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Solution

The fourth proportional to 85,662.13, 128,523.62 and 38,272.88 is: 57,422.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,662.13 : 128,523.62 = 38,272.88 : x
  2. Step 2: Convert to fraction form
    85,662.13/128,523.62 = 38,272.88/x
  3. Step 3: Cross multiply
    85,662.13x = 128,523.62 × 38,272.88
  4. Step 4: Simplify right side
    85,662.13x = 4,918,969,085.43
  5. Step 5: Solve for x
    x = 4,918,969,085.43/85,662.13
  6. Step 6: Final answer
    x = 57,422.91

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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.