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Finding the Fourth Proportional to 112,438.80, 168,658.20 and 68,042.70

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Solution

The fourth proportional to 112,438.80, 168,658.20 and 68,042.70 is: 102,064.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,438.80 : 168,658.20 = 68,042.70 : x
  2. Step 2: Convert to fraction form
    112,438.80/168,658.20 = 68,042.70/x
  3. Step 3: Cross multiply
    112,438.80x = 168,658.20 × 68,042.70
  4. Step 4: Simplify right side
    112,438.80x = 11,475,959,305.14
  5. Step 5: Solve for x
    x = 11,475,959,305.14/112,438.80
  6. Step 6: Final answer
    x = 102,064.05

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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.