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Finding the Fourth Proportional to 124,227.78, 171,434.74 and 67,639.50

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Solution

The fourth proportional to 124,227.78, 171,434.74 and 67,639.50 is: 93,342.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,227.78 : 171,434.74 = 67,639.50 : x
  2. Step 2: Convert to fraction form
    124,227.78/171,434.74 = 67,639.50/x
  3. Step 3: Cross multiply
    124,227.78x = 171,434.74 × 67,639.50
  4. Step 4: Simplify right side
    124,227.78x = 11,595,760,096.23
  5. Step 5: Solve for x
    x = 11,595,760,096.23/124,227.78
  6. Step 6: Final answer
    x = 93,342.73

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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.