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Finding the Fourth Proportional to 91,422.62, 126,174.89 and 51,138.62

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Solution

The fourth proportional to 91,422.62, 126,174.89 and 51,138.62 is: 70,577.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,422.62 : 126,174.89 = 51,138.62 : x
  2. Step 2: Convert to fraction form
    91,422.62/126,174.89 = 51,138.62/x
  3. Step 3: Cross multiply
    91,422.62x = 126,174.89 × 51,138.62
  4. Step 4: Simplify right side
    91,422.62x = 6,452,409,250.22
  5. Step 5: Solve for x
    x = 6,452,409,250.22/91,422.62
  6. Step 6: Final answer
    x = 70,577.82

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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.