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Finding the Fourth Proportional to 124,909.44, 172,370.88 and 74,578.56

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Solution

The fourth proportional to 124,909.44, 172,370.88 and 74,578.56 is: 102,915.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,909.44 : 172,370.88 = 74,578.56 : x
  2. Step 2: Convert to fraction form
    124,909.44/172,370.88 = 74,578.56/x
  3. Step 3: Cross multiply
    124,909.44x = 172,370.88 × 74,578.56
  4. Step 4: Simplify right side
    124,909.44x = 12,855,172,016.33
  5. Step 5: Solve for x
    x = 12,855,172,016.33/124,909.44
  6. Step 6: Final answer
    x = 102,915.94

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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.