Home / 121,781.67-168,046.83-76,445.16

Finding the Fourth Proportional to 121,781.67, 168,046.83 and 76,445.16

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Solution

The fourth proportional to 121,781.67, 168,046.83 and 76,445.16 is: 105,486.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,781.67 : 168,046.83 = 76,445.16 : x
  2. Step 2: Convert to fraction form
    121,781.67/168,046.83 = 76,445.16/x
  3. Step 3: Cross multiply
    121,781.67x = 168,046.83 × 76,445.16
  4. Step 4: Simplify right side
    121,781.67x = 12,846,366,806.84
  5. Step 5: Solve for x
    x = 12,846,366,806.84/121,781.67
  6. Step 6: Final answer
    x = 105,486.87

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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.