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Finding the Fourth Proportional to 67,982.40, 101,908.80 and 52,981.20

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Solution

The fourth proportional to 67,982.40, 101,908.80 and 52,981.20 is: 79,421.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,982.40 : 101,908.80 = 52,981.20 : x
  2. Step 2: Convert to fraction form
    67,982.40/101,908.80 = 52,981.20/x
  3. Step 3: Cross multiply
    67,982.40x = 101,908.80 × 52,981.20
  4. Step 4: Simplify right side
    67,982.40x = 5,399,250,514.56
  5. Step 5: Solve for x
    x = 5,399,250,514.56/67,982.40
  6. Step 6: Final answer
    x = 79,421.30

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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.