Home / 121,195.52-167,155.20-78,767.84

Finding the Fourth Proportional to 121,195.52, 167,155.20 and 78,767.84

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Solution

The fourth proportional to 121,195.52, 167,155.20 and 78,767.84 is: 108,638.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,195.52 : 167,155.20 = 78,767.84 : x
  2. Step 2: Convert to fraction form
    121,195.52/167,155.20 = 78,767.84/x
  3. Step 3: Cross multiply
    121,195.52x = 167,155.20 × 78,767.84
  4. Step 4: Simplify right side
    121,195.52x = 13,166,454,048.77
  5. Step 5: Solve for x
    x = 13,166,454,048.77/121,195.52
  6. Step 6: Final answer
    x = 108,638.12

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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.