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Finding the Fourth Proportional to 121,756.80, 168,009.83 and 67,301.61

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Solution

The fourth proportional to 121,756.80, 168,009.83 and 67,301.61 is: 92,868.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,756.80 : 168,009.83 = 67,301.61 : x
  2. Step 2: Convert to fraction form
    121,756.80/168,009.83 = 67,301.61/x
  3. Step 3: Cross multiply
    121,756.80x = 168,009.83 × 67,301.61
  4. Step 4: Simplify right side
    121,756.80x = 11,307,332,910.46
  5. Step 5: Solve for x
    x = 11,307,332,910.46/121,756.80
  6. Step 6: Final answer
    x = 92,868.18

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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.