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Finding the Fourth Proportional to 79,720.80, 119,595.60 and 32,978.40

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Solution

The fourth proportional to 79,720.80, 119,595.60 and 32,978.40 is: 49,473.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,720.80 : 119,595.60 = 32,978.40 : x
  2. Step 2: Convert to fraction form
    79,720.80/119,595.60 = 32,978.40/x
  3. Step 3: Cross multiply
    79,720.80x = 119,595.60 × 32,978.40
  4. Step 4: Simplify right side
    79,720.80x = 3,944,071,535.04
  5. Step 5: Solve for x
    x = 3,944,071,535.04/79,720.80
  6. Step 6: Final answer
    x = 49,473.56

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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.