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Finding the Fourth Proportional to 279,134.16, 418,702.80 and 68,770.56

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Solution

The fourth proportional to 279,134.16, 418,702.80 and 68,770.56 is: 103,156.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,134.16 : 418,702.80 = 68,770.56 : x
  2. Step 2: Convert to fraction form
    279,134.16/418,702.80 = 68,770.56/x
  3. Step 3: Cross multiply
    279,134.16x = 418,702.80 × 68,770.56
  4. Step 4: Simplify right side
    279,134.16x = 28,794,426,029.57
  5. Step 5: Solve for x
    x = 28,794,426,029.57/279,134.16
  6. Step 6: Final answer
    x = 103,156.22

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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.