Home / 121,261.86-167,281.20-81,029.57

Finding the Fourth Proportional to 121,261.86, 167,281.20 and 81,029.57

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Solution

The fourth proportional to 121,261.86, 167,281.20 and 81,029.57 is: 111,780.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,261.86 : 167,281.20 = 81,029.57 : x
  2. Step 2: Convert to fraction form
    121,261.86/167,281.20 = 81,029.57/x
  3. Step 3: Cross multiply
    121,261.86x = 167,281.20 × 81,029.57
  4. Step 4: Simplify right side
    121,261.86x = 13,554,722,868.68
  5. Step 5: Solve for x
    x = 13,554,722,868.68/121,261.86
  6. Step 6: Final answer
    x = 111,780.60

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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.