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Finding the Fourth Proportional to 85,531.25, 128,264.97 and 29,355.42

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Solution

The fourth proportional to 85,531.25, 128,264.97 and 29,355.42 is: 44,022.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,531.25 : 128,264.97 = 29,355.42 : x
  2. Step 2: Convert to fraction form
    85,531.25/128,264.97 = 29,355.42/x
  3. Step 3: Cross multiply
    85,531.25x = 128,264.97 × 29,355.42
  4. Step 4: Simplify right side
    85,531.25x = 3,765,272,065.64
  5. Step 5: Solve for x
    x = 3,765,272,065.64/85,531.25
  6. Step 6: Final answer
    x = 44,022.18

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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.