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Finding the Fourth Proportional to 138,666.56, 207,872.28 and 75,394.24

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Solution

The fourth proportional to 138,666.56, 207,872.28 and 75,394.24 is: 113,022.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,666.56 : 207,872.28 = 75,394.24 : x
  2. Step 2: Convert to fraction form
    138,666.56/207,872.28 = 75,394.24/x
  3. Step 3: Cross multiply
    138,666.56x = 207,872.28 × 75,394.24
  4. Step 4: Simplify right side
    138,666.56x = 15,672,372,567.67
  5. Step 5: Solve for x
    x = 15,672,372,567.67/138,666.56
  6. Step 6: Final answer
    x = 113,022.00

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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.