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Finding the Fourth Proportional to 318,119.58, 477,175.17 and 78,235.55

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Solution

The fourth proportional to 318,119.58, 477,175.17 and 78,235.55 is: 117,352.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,119.58 : 477,175.17 = 78,235.55 : x
  2. Step 2: Convert to fraction form
    318,119.58/477,175.17 = 78,235.55/x
  3. Step 3: Cross multiply
    318,119.58x = 477,175.17 × 78,235.55
  4. Step 4: Simplify right side
    318,119.58x = 37,332,061,871.29
  5. Step 5: Solve for x
    x = 37,332,061,871.29/318,119.58
  6. Step 6: Final answer
    x = 117,352.29

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1.5x scale

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.