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Finding the Fourth Proportional to 91,930.68, 126,912.72 and 61,874.04

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Solution

The fourth proportional to 91,930.68, 126,912.72 and 61,874.04 is: 85,418.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,930.68 : 126,912.72 = 61,874.04 : x
  2. Step 2: Convert to fraction form
    91,930.68/126,912.72 = 61,874.04/x
  3. Step 3: Cross multiply
    91,930.68x = 126,912.72 × 61,874.04
  4. Step 4: Simplify right side
    91,930.68x = 7,852,602,713.79
  5. Step 5: Solve for x
    x = 7,852,602,713.79/91,930.68
  6. Step 6: Final answer
    x = 85,418.74

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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.