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Finding the Fourth Proportional to 132,403.20, 198,609.60 and 38,918.40

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Solution

The fourth proportional to 132,403.20, 198,609.60 and 38,918.40 is: 58,379.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,403.20 : 198,609.60 = 38,918.40 : x
  2. Step 2: Convert to fraction form
    132,403.20/198,609.60 = 38,918.40/x
  3. Step 3: Cross multiply
    132,403.20x = 198,609.60 × 38,918.40
  4. Step 4: Simplify right side
    132,403.20x = 7,729,567,856.64
  5. Step 5: Solve for x
    x = 7,729,567,856.64/132,403.20
  6. Step 6: Final answer
    x = 58,379.01

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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.