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Finding the Fourth Proportional to 79,718.40, 119,347.20 and 48,614.40

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Solution

The fourth proportional to 79,718.40, 119,347.20 and 48,614.40 is: 72,781.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,718.40 : 119,347.20 = 48,614.40 : x
  2. Step 2: Convert to fraction form
    79,718.40/119,347.20 = 48,614.40/x
  3. Step 3: Cross multiply
    79,718.40x = 119,347.20 × 48,614.40
  4. Step 4: Simplify right side
    79,718.40x = 5,801,992,519.68
  5. Step 5: Solve for x
    x = 5,801,992,519.68/79,718.40
  6. Step 6: Final answer
    x = 72,781.10

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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.