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Finding the Fourth Proportional to 121,636.80, 167,800.80 and 76,292.16

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Solution

The fourth proportional to 121,636.80, 167,800.80 and 76,292.16 is: 105,246.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,636.80 : 167,800.80 = 76,292.16 : x
  2. Step 2: Convert to fraction form
    121,636.80/167,800.80 = 76,292.16/x
  3. Step 3: Cross multiply
    121,636.80x = 167,800.80 × 76,292.16
  4. Step 4: Simplify right side
    121,636.80x = 12,801,885,481.73
  5. Step 5: Solve for x
    x = 12,801,885,481.73/121,636.80
  6. Step 6: Final answer
    x = 105,246.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.