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Finding the Fourth Proportional to 137,725.80, 206,588.70 and 67,590.60

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Solution

The fourth proportional to 137,725.80, 206,588.70 and 67,590.60 is: 101,385.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,725.80 : 206,588.70 = 67,590.60 : x
  2. Step 2: Convert to fraction form
    137,725.80/206,588.70 = 67,590.60/x
  3. Step 3: Cross multiply
    137,725.80x = 206,588.70 × 67,590.60
  4. Step 4: Simplify right side
    137,725.80x = 13,963,454,186.22
  5. Step 5: Solve for x
    x = 13,963,454,186.22/137,725.80
  6. Step 6: Final answer
    x = 101,385.90

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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.