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Finding the Fourth Proportional to 318,614.34, 477,922.86 and 129,078.39

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Solution

The fourth proportional to 318,614.34, 477,922.86 and 129,078.39 is: 193,618.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,614.34 : 477,922.86 = 129,078.39 : x
  2. Step 2: Convert to fraction form
    318,614.34/477,922.86 = 129,078.39/x
  3. Step 3: Cross multiply
    318,614.34x = 477,922.86 × 129,078.39
  4. Step 4: Simplify right side
    318,614.34x = 61,689,513,313.00
  5. Step 5: Solve for x
    x = 61,689,513,313.00/318,614.34
  6. Step 6: Final answer
    x = 193,618.13

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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.