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Finding the Fourth Proportional to 81,642.90, 112,672.25 and 54,372.23

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Solution

The fourth proportional to 81,642.90, 112,672.25 and 54,372.23 is: 75,037.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,642.90 : 112,672.25 = 54,372.23 : x
  2. Step 2: Convert to fraction form
    81,642.90/112,672.25 = 54,372.23/x
  3. Step 3: Cross multiply
    81,642.90x = 112,672.25 × 54,372.23
  4. Step 4: Simplify right side
    81,642.90x = 6,126,241,491.62
  5. Step 5: Solve for x
    x = 6,126,241,491.62/81,642.90
  6. Step 6: Final answer
    x = 75,037.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.