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Finding the Fourth Proportional to 279,114.64, 418,672.14 and 121,256.98

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Solution

The fourth proportional to 279,114.64, 418,672.14 and 121,256.98 is: 181,885.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,114.64 : 418,672.14 = 121,256.98 : x
  2. Step 2: Convert to fraction form
    279,114.64/418,672.14 = 121,256.98/x
  3. Step 3: Cross multiply
    279,114.64x = 418,672.14 × 121,256.98
  4. Step 4: Simplify right side
    279,114.64x = 50,766,919,306.54
  5. Step 5: Solve for x
    x = 50,766,919,306.54/279,114.64
  6. Step 6: Final answer
    x = 181,885.55

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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.