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Finding the Fourth Proportional to 138,326.42, 207,156.96 and 78,982.22

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Solution

The fourth proportional to 138,326.42, 207,156.96 and 78,982.22 is: 118,283.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,326.42 : 207,156.96 = 78,982.22 : x
  2. Step 2: Convert to fraction form
    138,326.42/207,156.96 = 78,982.22/x
  3. Step 3: Cross multiply
    138,326.42x = 207,156.96 × 78,982.22
  4. Step 4: Simplify right side
    138,326.42x = 16,361,716,589.25
  5. Step 5: Solve for x
    x = 16,361,716,589.25/138,326.42
  6. Step 6: Final answer
    x = 118,283.38

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1.5x scale

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.