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Finding the Fourth Proportional to 79,541.15, 119,308.98 and 20,377.40

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Solution

The fourth proportional to 79,541.15, 119,308.98 and 20,377.40 is: 30,565.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,541.15 : 119,308.98 = 20,377.40 : x
  2. Step 2: Convert to fraction form
    79,541.15/119,308.98 = 20,377.40/x
  3. Step 3: Cross multiply
    79,541.15x = 119,308.98 × 20,377.40
  4. Step 4: Simplify right side
    79,541.15x = 2,431,206,809.05
  5. Step 5: Solve for x
    x = 2,431,206,809.05/79,541.15
  6. Step 6: Final answer
    x = 30,565.40

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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.