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Finding the Fourth Proportional to 125,682.68, 188,613.98 and 45,720.49

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Solution

The fourth proportional to 125,682.68, 188,613.98 and 45,720.49 is: 68,613.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,682.68 : 188,613.98 = 45,720.49 : x
  2. Step 2: Convert to fraction form
    125,682.68/188,613.98 = 45,720.49/x
  3. Step 3: Cross multiply
    125,682.68x = 188,613.98 × 45,720.49
  4. Step 4: Simplify right side
    125,682.68x = 8,623,522,414.78
  5. Step 5: Solve for x
    x = 8,623,522,414.78/125,682.68
  6. Step 6: Final answer
    x = 68,613.45

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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.