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Finding the Fourth Proportional to 125,380.80, 188,289.90 and 121,444.20

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Solution

The fourth proportional to 125,380.80, 188,289.90 and 121,444.20 is: 182,378.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,380.80 : 188,289.90 = 121,444.20 : x
  2. Step 2: Convert to fraction form
    125,380.80/188,289.90 = 121,444.20/x
  3. Step 3: Cross multiply
    125,380.80x = 188,289.90 × 121,444.20
  4. Step 4: Simplify right side
    125,380.80x = 22,866,716,273.58
  5. Step 5: Solve for x
    x = 22,866,716,273.58/125,380.80
  6. Step 6: Final answer
    x = 182,378.13

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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.