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Finding the Fourth Proportional to 137,920.62, 206,880.62 and 36,718.70

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Solution

The fourth proportional to 137,920.62, 206,880.62 and 36,718.70 is: 55,077.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,920.62 : 206,880.62 = 36,718.70 : x
  2. Step 2: Convert to fraction form
    137,920.62/206,880.62 = 36,718.70/x
  3. Step 3: Cross multiply
    137,920.62x = 206,880.62 × 36,718.70
  4. Step 4: Simplify right side
    137,920.62x = 7,596,387,421.59
  5. Step 5: Solve for x
    x = 7,596,387,421.59/137,920.62
  6. Step 6: Final answer
    x = 55,077.97

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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.