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Finding the Fourth Proportional to 136,868.61, 205,310.21 and 43,381.65

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Solution

The fourth proportional to 136,868.61, 205,310.21 and 43,381.65 is: 65,074.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,868.61 : 205,310.21 = 43,381.65 : x
  2. Step 2: Convert to fraction form
    136,868.61/205,310.21 = 43,381.65/x
  3. Step 3: Cross multiply
    136,868.61x = 205,310.21 × 43,381.65
  4. Step 4: Simplify right side
    136,868.61x = 8,906,695,671.65
  5. Step 5: Solve for x
    x = 8,906,695,671.65/136,868.61
  6. Step 6: Final answer
    x = 65,074.79

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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.