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Finding the Fourth Proportional to 83,679.57, 115,474.57 and 47,872.89

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Solution

The fourth proportional to 83,679.57, 115,474.57 and 47,872.89 is: 66,062.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,679.57 : 115,474.57 = 47,872.89 : x
  2. Step 2: Convert to fraction form
    83,679.57/115,474.57 = 47,872.89/x
  3. Step 3: Cross multiply
    83,679.57x = 115,474.57 × 47,872.89
  4. Step 4: Simplify right side
    83,679.57x = 5,528,101,387.41
  5. Step 5: Solve for x
    x = 5,528,101,387.41/83,679.57
  6. Step 6: Final answer
    x = 66,062.74

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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.