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Finding the Fourth Proportional to 137,820.80, 206,731.20 and 136,654.40

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Solution

The fourth proportional to 137,820.80, 206,731.20 and 136,654.40 is: 204,981.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,820.80 : 206,731.20 = 136,654.40 : x
  2. Step 2: Convert to fraction form
    137,820.80/206,731.20 = 136,654.40/x
  3. Step 3: Cross multiply
    137,820.80x = 206,731.20 × 136,654.40
  4. Step 4: Simplify right side
    137,820.80x = 28,250,728,097.28
  5. Step 5: Solve for x
    x = 28,250,728,097.28/137,820.80
  6. Step 6: Final answer
    x = 204,981.60

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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.