Home / 121,419.10-182,128.65-74,179.90

Finding the Fourth Proportional to 121,419.10, 182,128.65 and 74,179.90

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Solution

The fourth proportional to 121,419.10, 182,128.65 and 74,179.90 is: 111,269.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,419.10 : 182,128.65 = 74,179.90 : x
  2. Step 2: Convert to fraction form
    121,419.10/182,128.65 = 74,179.90/x
  3. Step 3: Cross multiply
    121,419.10x = 182,128.65 × 74,179.90
  4. Step 4: Simplify right side
    121,419.10x = 13,510,285,044.14
  5. Step 5: Solve for x
    x = 13,510,285,044.14/121,419.10
  6. Step 6: Final answer
    x = 111,269.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.