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Finding the Fourth Proportional to 85,617.62, 128,452.29 and 25,648.04

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Solution

The fourth proportional to 85,617.62, 128,452.29 and 25,648.04 is: 38,479.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,617.62 : 128,452.29 = 25,648.04 : x
  2. Step 2: Convert to fraction form
    85,617.62/128,452.29 = 25,648.04/x
  3. Step 3: Cross multiply
    85,617.62x = 128,452.29 × 25,648.04
  4. Step 4: Simplify right side
    85,617.62x = 3,294,549,472.01
  5. Step 5: Solve for x
    x = 3,294,549,472.01/85,617.62
  6. Step 6: Final answer
    x = 38,479.81

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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.