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Finding the Fourth Proportional to 168,807.30, 253,138.05 and 84,534.90

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Solution

The fourth proportional to 168,807.30, 253,138.05 and 84,534.90 is: 126,765.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    168,807.30 : 253,138.05 = 84,534.90 : x
  2. Step 2: Convert to fraction form
    168,807.30/253,138.05 = 84,534.90/x
  3. Step 3: Cross multiply
    168,807.30x = 253,138.05 × 84,534.90
  4. Step 4: Simplify right side
    168,807.30x = 21,398,999,742.95
  5. Step 5: Solve for x
    x = 21,398,999,742.95/168,807.30
  6. Step 6: Final answer
    x = 126,765.84

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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.