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Finding the Fourth Proportional to 125,988.40, 188,982.60 and 103,826.80

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Solution

The fourth proportional to 125,988.40, 188,982.60 and 103,826.80 is: 155,740.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,988.40 : 188,982.60 = 103,826.80 : x
  2. Step 2: Convert to fraction form
    125,988.40/188,982.60 = 103,826.80/x
  3. Step 3: Cross multiply
    125,988.40x = 188,982.60 × 103,826.80
  4. Step 4: Simplify right side
    125,988.40x = 19,621,458,613.68
  5. Step 5: Solve for x
    x = 19,621,458,613.68/125,988.40
  6. Step 6: Final answer
    x = 155,740.20

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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.