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Finding the Fourth Proportional to 169,311.42, 254,005.41 and 85,111.92

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Solution

The fourth proportional to 169,311.42, 254,005.41 and 85,111.92 is: 127,687.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,311.42 : 254,005.41 = 85,111.92 : x
  2. Step 2: Convert to fraction form
    169,311.42/254,005.41 = 85,111.92/x
  3. Step 3: Cross multiply
    169,311.42x = 254,005.41 × 85,111.92
  4. Step 4: Simplify right side
    169,311.42x = 21,618,888,135.49
  5. Step 5: Solve for x
    x = 21,618,888,135.49/169,311.42
  6. Step 6: Final answer
    x = 127,687.12

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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.