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Finding the Fourth Proportional to 85,630.66, 128,405.49 and 25,635.97

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Solution

The fourth proportional to 85,630.66, 128,405.49 and 25,635.97 is: 38,441.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,630.66 : 128,405.49 = 25,635.97 : x
  2. Step 2: Convert to fraction form
    85,630.66/128,405.49 = 25,635.97/x
  3. Step 3: Cross multiply
    85,630.66x = 128,405.49 × 25,635.97
  4. Step 4: Simplify right side
    85,630.66x = 3,291,799,100.86
  5. Step 5: Solve for x
    x = 3,291,799,100.86/85,630.66
  6. Step 6: Final answer
    x = 38,441.83

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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.