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Finding the Fourth Proportional to 113,879.85, 157,142.26 and 66,123.87

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Solution

The fourth proportional to 113,879.85, 157,142.26 and 66,123.87 is: 91,244.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,879.85 : 157,142.26 = 66,123.87 : x
  2. Step 2: Convert to fraction form
    113,879.85/157,142.26 = 66,123.87/x
  3. Step 3: Cross multiply
    113,879.85x = 157,142.26 × 66,123.87
  4. Step 4: Simplify right side
    113,879.85x = 10,390,854,371.75
  5. Step 5: Solve for x
    x = 10,390,854,371.75/113,879.85
  6. Step 6: Final answer
    x = 91,244.01

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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.