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Finding the Fourth Proportional to 138,222.60, 206,945.10 and 124,225.80

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Solution

The fourth proportional to 138,222.60, 206,945.10 and 124,225.80 is: 185,989.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,222.60 : 206,945.10 = 124,225.80 : x
  2. Step 2: Convert to fraction form
    138,222.60/206,945.10 = 124,225.80/x
  3. Step 3: Cross multiply
    138,222.60x = 206,945.10 × 124,225.80
  4. Step 4: Simplify right side
    138,222.60x = 25,707,920,603.58
  5. Step 5: Solve for x
    x = 25,707,920,603.58/138,222.60
  6. Step 6: Final answer
    x = 185,989.27

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.