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Finding the Fourth Proportional to 121,555.32, 167,741.92 and 76,257.68

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Solution

The fourth proportional to 121,555.32, 167,741.92 and 76,257.68 is: 105,232.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,555.32 : 167,741.92 = 76,257.68 : x
  2. Step 2: Convert to fraction form
    121,555.32/167,741.92 = 76,257.68/x
  3. Step 3: Cross multiply
    121,555.32x = 167,741.92 × 76,257.68
  4. Step 4: Simplify right side
    121,555.32x = 12,791,609,657.95
  5. Step 5: Solve for x
    x = 12,791,609,657.95/121,555.32
  6. Step 6: Final answer
    x = 105,232.82

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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.