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Finding the Fourth Proportional to 124,011.54, 171,129.96 and 67,422.87

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Solution

The fourth proportional to 124,011.54, 171,129.96 and 67,422.87 is: 93,040.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,011.54 : 171,129.96 = 67,422.87 : x
  2. Step 2: Convert to fraction form
    124,011.54/171,129.96 = 67,422.87/x
  3. Step 3: Cross multiply
    124,011.54x = 171,129.96 × 67,422.87
  4. Step 4: Simplify right side
    124,011.54x = 11,538,073,046.19
  5. Step 5: Solve for x
    x = 11,538,073,046.19/124,011.54
  6. Step 6: Final answer
    x = 93,040.32

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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.