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Finding the Fourth Proportional to 84,491.60, 126,737.40 and 51,249.20

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Solution

The fourth proportional to 84,491.60, 126,737.40 and 51,249.20 is: 76,873.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,491.60 : 126,737.40 = 51,249.20 : x
  2. Step 2: Convert to fraction form
    84,491.60/126,737.40 = 51,249.20/x
  3. Step 3: Cross multiply
    84,491.60x = 126,737.40 × 51,249.20
  4. Step 4: Simplify right side
    84,491.60x = 6,495,190,360.08
  5. Step 5: Solve for x
    x = 6,495,190,360.08/84,491.60
  6. Step 6: Final answer
    x = 76,873.80

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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.