Home / 121,748.64-168,120-76,505.04

Finding the Fourth Proportional to 121,748.64, 168,120 and 76,505.04

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Solution

The fourth proportional to 121,748.64, 168,120 and 76,505.04 is: 105,644.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,748.64 : 168,120 = 76,505.04 : x
  2. Step 2: Convert to fraction form
    121,748.64/168,120 = 76,505.04/x
  3. Step 3: Cross multiply
    121,748.64x = 168,120 × 76,505.04
  4. Step 4: Simplify right side
    121,748.64x = 12,862,027,324.80
  5. Step 5: Solve for x
    x = 12,862,027,324.80/121,748.64
  6. Step 6: Final answer
    x = 105,644.11

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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.