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Finding the Fourth Proportional to 137,959.20, 206,938.80 and 102,529.80

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Solution

The fourth proportional to 137,959.20, 206,938.80 and 102,529.80 is: 153,794.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,959.20 : 206,938.80 = 102,529.80 : x
  2. Step 2: Convert to fraction form
    137,959.20/206,938.80 = 102,529.80/x
  3. Step 3: Cross multiply
    137,959.20x = 206,938.80 × 102,529.80
  4. Step 4: Simplify right side
    137,959.20x = 21,217,393,776.24
  5. Step 5: Solve for x
    x = 21,217,393,776.24/137,959.20
  6. Step 6: Final answer
    x = 153,794.70

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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.