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Finding the Fourth Proportional to 318,615.34, 477,924.36 and 129,079.39

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Solution

The fourth proportional to 318,615.34, 477,924.36 and 129,079.39 is: 193,619.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,615.34 : 477,924.36 = 129,079.39 : x
  2. Step 2: Convert to fraction form
    318,615.34/477,924.36 = 129,079.39/x
  3. Step 3: Cross multiply
    318,615.34x = 477,924.36 × 129,079.39
  4. Step 4: Simplify right side
    318,615.34x = 61,690,184,854.94
  5. Step 5: Solve for x
    x = 61,690,184,854.94/318,615.34
  6. Step 6: Final answer
    x = 193,619.63

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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.