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Finding the Fourth Proportional to 318,668.74, 477,781.65 and 141,078.88

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Solution

The fourth proportional to 318,668.74, 477,781.65 and 141,078.88 is: 211,520.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,668.74 : 477,781.65 = 141,078.88 : x
  2. Step 2: Convert to fraction form
    318,668.74/477,781.65 = 141,078.88/x
  3. Step 3: Cross multiply
    318,668.74x = 477,781.65 × 141,078.88
  4. Step 4: Simplify right side
    318,668.74x = 67,404,900,066.55
  5. Step 5: Solve for x
    x = 67,404,900,066.55/318,668.74
  6. Step 6: Final answer
    x = 211,520.28

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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.