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Finding the Fourth Proportional to 318,245.22, 477,099.72 and 138,195.18

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Solution

The fourth proportional to 318,245.22, 477,099.72 and 138,195.18 is: 207,176.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,245.22 : 477,099.72 = 138,195.18 : x
  2. Step 2: Convert to fraction form
    318,245.22/477,099.72 = 138,195.18/x
  3. Step 3: Cross multiply
    318,245.22x = 477,099.72 × 138,195.18
  4. Step 4: Simplify right side
    318,245.22x = 65,932,881,683.35
  5. Step 5: Solve for x
    x = 65,932,881,683.35/318,245.22
  6. Step 6: Final answer
    x = 207,176.35

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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.