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Finding the Fourth Proportional to 85,531.75, 128,265.71 and 29,355.92

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Solution

The fourth proportional to 85,531.75, 128,265.71 and 29,355.92 is: 44,022.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,531.75 : 128,265.71 = 29,355.92 : x
  2. Step 2: Convert to fraction form
    85,531.75/128,265.71 = 29,355.92/x
  3. Step 3: Cross multiply
    85,531.75x = 128,265.71 × 29,355.92
  4. Step 4: Simplify right side
    85,531.75x = 3,765,357,353.56
  5. Step 5: Solve for x
    x = 3,765,357,353.56/85,531.75
  6. Step 6: Final answer
    x = 44,022.92

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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.