Home / 318,204.20-477,297.72-78,320.24

Finding the Fourth Proportional to 318,204.20, 477,297.72 and 78,320.24

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Solution

The fourth proportional to 318,204.20, 477,297.72 and 78,320.24 is: 117,478.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,204.20 : 477,297.72 = 78,320.24 : x
  2. Step 2: Convert to fraction form
    318,204.20/477,297.72 = 78,320.24/x
  3. Step 3: Cross multiply
    318,204.20x = 477,297.72 × 78,320.24
  4. Step 4: Simplify right side
    318,204.20x = 37,382,071,981.85
  5. Step 5: Solve for x
    x = 37,382,071,981.85/318,204.20
  6. Step 6: Final answer
    x = 117,478.25

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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.