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Finding the Fourth Proportional to 84,278.88, 126,375.84 and 28,099.44

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Solution

The fourth proportional to 84,278.88, 126,375.84 and 28,099.44 is: 42,135.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,278.88 : 126,375.84 = 28,099.44 : x
  2. Step 2: Convert to fraction form
    84,278.88/126,375.84 = 28,099.44/x
  3. Step 3: Cross multiply
    84,278.88x = 126,375.84 × 28,099.44
  4. Step 4: Simplify right side
    84,278.88x = 3,551,090,333.53
  5. Step 5: Solve for x
    x = 3,551,090,333.53/84,278.88
  6. Step 6: Final answer
    x = 42,135.00

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1.5x scale

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.