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Finding the Fourth Proportional to 91,980.32, 126,933.94 and 51,691.72

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Solution

The fourth proportional to 91,980.32, 126,933.94 and 51,691.72 is: 71,335.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,980.32 : 126,933.94 = 51,691.72 : x
  2. Step 2: Convert to fraction form
    91,980.32/126,933.94 = 51,691.72/x
  3. Step 3: Cross multiply
    91,980.32x = 126,933.94 × 51,691.72
  4. Step 4: Simplify right side
    91,980.32x = 6,561,433,684.98
  5. Step 5: Solve for x
    x = 6,561,433,684.98/91,980.32
  6. Step 6: Final answer
    x = 71,335.19

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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.