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Finding the Fourth Proportional to 137,729.80, 206,594.70 and 115,422.40

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Solution

The fourth proportional to 137,729.80, 206,594.70 and 115,422.40 is: 173,133.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,729.80 : 206,594.70 = 115,422.40 : x
  2. Step 2: Convert to fraction form
    137,729.80/206,594.70 = 115,422.40/x
  3. Step 3: Cross multiply
    137,729.80x = 206,594.70 × 115,422.40
  4. Step 4: Simplify right side
    137,729.80x = 23,845,656,101.28
  5. Step 5: Solve for x
    x = 23,845,656,101.28/137,729.80
  6. Step 6: Final answer
    x = 173,133.60

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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.