Home / 121,922.30-168,279.10-74,191.02

Finding the Fourth Proportional to 121,922.30, 168,279.10 and 74,191.02

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Solution

The fourth proportional to 121,922.30, 168,279.10 and 74,191.02 is: 102,399.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,922.30 : 168,279.10 = 74,191.02 : x
  2. Step 2: Convert to fraction form
    121,922.30/168,279.10 = 74,191.02/x
  3. Step 3: Cross multiply
    121,922.30x = 168,279.10 × 74,191.02
  4. Step 4: Simplify right side
    121,922.30x = 12,484,798,073.68
  5. Step 5: Solve for x
    x = 12,484,798,073.68/121,922.30
  6. Step 6: Final answer
    x = 102,399.63

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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.