Home / 121,100.00-167,155.14-78,079.55

Finding the Fourth Proportional to 121,100.00, 167,155.14 and 78,079.55

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Solution

The fourth proportional to 121,100.00, 167,155.14 and 78,079.55 is: 107,773.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,100.00 : 167,155.14 = 78,079.55 : x
  2. Step 2: Convert to fraction form
    121,100.00/167,155.14 = 78,079.55/x
  3. Step 3: Cross multiply
    121,100.00x = 167,155.14 × 78,079.55
  4. Step 4: Simplify right side
    121,100.00x = 13,051,397,568.41
  5. Step 5: Solve for x
    x = 13,051,397,568.41/121,100.00
  6. Step 6: Final answer
    x = 107,773.72

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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.