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Finding the Fourth Proportional to 112,432.80, 168,778.80 and 68,109.60

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Solution

The fourth proportional to 112,432.80, 168,778.80 and 68,109.60 is: 102,242.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,432.80 : 168,778.80 = 68,109.60 : x
  2. Step 2: Convert to fraction form
    112,432.80/168,778.80 = 68,109.60/x
  3. Step 3: Cross multiply
    112,432.80x = 168,778.80 × 68,109.60
  4. Step 4: Simplify right side
    112,432.80x = 11,495,456,556.48
  5. Step 5: Solve for x
    x = 11,495,456,556.48/112,432.80
  6. Step 6: Final answer
    x = 102,242.91

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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.