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Finding the Fourth Proportional to 206,891.60, 310,045.80 and 127,770.80

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Solution

The fourth proportional to 206,891.60, 310,045.80 and 127,770.80 is: 191,476.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,891.60 : 310,045.80 = 127,770.80 : x
  2. Step 2: Convert to fraction form
    206,891.60/310,045.80 = 127,770.80/x
  3. Step 3: Cross multiply
    206,891.60x = 310,045.80 × 127,770.80
  4. Step 4: Simplify right side
    206,891.60x = 39,614,799,902.64
  5. Step 5: Solve for x
    x = 39,614,799,902.64/206,891.60
  6. Step 6: Final answer
    x = 191,476.12

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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.