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Finding the Fourth Proportional to 251,613.96, 347,222.30 and 138,438.60

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Solution

The fourth proportional to 251,613.96, 347,222.30 and 138,438.60 is: 191,042.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,613.96 : 347,222.30 = 138,438.60 : x
  2. Step 2: Convert to fraction form
    251,613.96/347,222.30 = 138,438.60/x
  3. Step 3: Cross multiply
    251,613.96x = 347,222.30 × 138,438.60
  4. Step 4: Simplify right side
    251,613.96x = 48,068,969,100.78
  5. Step 5: Solve for x
    x = 48,068,969,100.78/251,613.96
  6. Step 6: Final answer
    x = 191,042.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.