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Finding the Fourth Proportional to 426,613.96, 639,959.21 and 111,073.60

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Solution

The fourth proportional to 426,613.96, 639,959.21 and 111,073.60 is: 166,620.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,613.96 : 639,959.21 = 111,073.60 : x
  2. Step 2: Convert to fraction form
    426,613.96/639,959.21 = 111,073.60/x
  3. Step 3: Cross multiply
    426,613.96x = 639,959.21 × 111,073.60
  4. Step 4: Simplify right side
    426,613.96x = 71,082,574,593.75
  5. Step 5: Solve for x
    x = 71,082,574,593.75/426,613.96
  6. Step 6: Final answer
    x = 166,620.37

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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.