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Finding the Fourth Proportional to 81,045.75, 121,569.17 and 25,641.75

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Solution

The fourth proportional to 81,045.75, 121,569.17 and 25,641.75 is: 38,462.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,045.75 : 121,569.17 = 25,641.75 : x
  2. Step 2: Convert to fraction form
    81,045.75/121,569.17 = 25,641.75/x
  3. Step 3: Cross multiply
    81,045.75x = 121,569.17 × 25,641.75
  4. Step 4: Simplify right side
    81,045.75x = 3,117,246,264.85
  5. Step 5: Solve for x
    x = 3,117,246,264.85/81,045.75
  6. Step 6: Final answer
    x = 38,462.80

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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.