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Finding the Fourth Proportional to 81,321.62, 121,934.24 and 25,145.10

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Solution

The fourth proportional to 81,321.62, 121,934.24 and 25,145.10 is: 37,702.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,321.62 : 121,934.24 = 25,145.10 : x
  2. Step 2: Convert to fraction form
    81,321.62/121,934.24 = 25,145.10/x
  3. Step 3: Cross multiply
    81,321.62x = 121,934.24 × 25,145.10
  4. Step 4: Simplify right side
    81,321.62x = 3,066,048,658.22
  5. Step 5: Solve for x
    x = 3,066,048,658.22/81,321.62
  6. Step 6: Final answer
    x = 37,702.75

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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.