Home / 121,170.85-167,185.43-72,780.91

Finding the Fourth Proportional to 121,170.85, 167,185.43 and 72,780.91

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Solution

The fourth proportional to 121,170.85, 167,185.43 and 72,780.91 is: 100,419.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,170.85 : 167,185.43 = 72,780.91 : x
  2. Step 2: Convert to fraction form
    121,170.85/167,185.43 = 72,780.91/x
  3. Step 3: Cross multiply
    121,170.85x = 167,185.43 × 72,780.91
  4. Step 4: Simplify right side
    121,170.85x = 12,167,907,370.24
  5. Step 5: Solve for x
    x = 12,167,907,370.24/121,170.85
  6. Step 6: Final answer
    x = 100,419.43

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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.