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Finding the Fourth Proportional to 125,613.20, 188,419.80 and 55,456.40

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Solution

The fourth proportional to 125,613.20, 188,419.80 and 55,456.40 is: 83,184.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,613.20 : 188,419.80 = 55,456.40 : x
  2. Step 2: Convert to fraction form
    125,613.20/188,419.80 = 55,456.40/x
  3. Step 3: Cross multiply
    125,613.20x = 188,419.80 × 55,456.40
  4. Step 4: Simplify right side
    125,613.20x = 10,449,083,796.72
  5. Step 5: Solve for x
    x = 10,449,083,796.72/125,613.20
  6. Step 6: Final answer
    x = 83,184.60

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1.5x scale

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.