Home / 129,864.80-194,408.40-77,247.20

Finding the Fourth Proportional to 129,864.80, 194,408.40 and 77,247.20

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Solution

The fourth proportional to 129,864.80, 194,408.40 and 77,247.20 is: 115,639.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,864.80 : 194,408.40 = 77,247.20 : x
  2. Step 2: Convert to fraction form
    129,864.80/194,408.40 = 77,247.20/x
  3. Step 3: Cross multiply
    129,864.80x = 194,408.40 × 77,247.20
  4. Step 4: Simplify right side
    129,864.80x = 15,017,504,556.48
  5. Step 5: Solve for x
    x = 15,017,504,556.48/129,864.80
  6. Step 6: Final answer
    x = 115,639.53

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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.