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Finding the Fourth Proportional to 121,891.80, 167,732.46 and 107,778.36

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Solution

The fourth proportional to 121,891.80, 167,732.46 and 107,778.36 is: 148,311.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,891.80 : 167,732.46 = 107,778.36 : x
  2. Step 2: Convert to fraction form
    121,891.80/167,732.46 = 107,778.36/x
  3. Step 3: Cross multiply
    121,891.80x = 167,732.46 × 107,778.36
  4. Step 4: Simplify right side
    121,891.80x = 18,077,929,457.57
  5. Step 5: Solve for x
    x = 18,077,929,457.57/121,891.80
  6. Step 6: Final answer
    x = 148,311.28

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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.