Home / 121,150-167,169.06-72,741.70

Finding the Fourth Proportional to 121,150, 167,169.06 and 72,741.70

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Solution

The fourth proportional to 121,150, 167,169.06 and 72,741.70 is: 100,372.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,150 : 167,169.06 = 72,741.70 : x
  2. Step 2: Convert to fraction form
    121,150/167,169.06 = 72,741.70/x
  3. Step 3: Cross multiply
    121,150x = 167,169.06 × 72,741.70
  4. Step 4: Simplify right side
    121,150x = 12,160,161,611.80
  5. Step 5: Solve for x
    x = 12,160,161,611.80/121,150
  6. Step 6: Final answer
    x = 100,372.77

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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.