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Finding the Fourth Proportional to 169,434.18, 253,986.03 and 80,663.85

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Solution

The fourth proportional to 169,434.18, 253,986.03 and 80,663.85 is: 120,917.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,434.18 : 253,986.03 = 80,663.85 : x
  2. Step 2: Convert to fraction form
    169,434.18/253,986.03 = 80,663.85/x
  3. Step 3: Cross multiply
    169,434.18x = 253,986.03 × 80,663.85
  4. Step 4: Simplify right side
    169,434.18x = 20,487,492,280.95
  5. Step 5: Solve for x
    x = 20,487,492,280.95/169,434.18
  6. Step 6: Final answer
    x = 120,917.11

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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.