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Finding the Fourth Proportional to 199,770.60, 299,655.90 and 81,377.40

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Solution

The fourth proportional to 199,770.60, 299,655.90 and 81,377.40 is: 122,066.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,770.60 : 299,655.90 = 81,377.40 : x
  2. Step 2: Convert to fraction form
    199,770.60/299,655.90 = 81,377.40/x
  3. Step 3: Cross multiply
    199,770.60x = 299,655.90 × 81,377.40
  4. Step 4: Simplify right side
    199,770.60x = 24,385,218,036.66
  5. Step 5: Solve for x
    x = 24,385,218,036.66/199,770.60
  6. Step 6: Final answer
    x = 122,066.10

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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.