Home / 138,631.62-207,947.43-54,431.43

Finding the Fourth Proportional to 138,631.62, 207,947.43 and 54,431.43

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Solution

The fourth proportional to 138,631.62, 207,947.43 and 54,431.43 is: 81,647.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,631.62 : 207,947.43 = 54,431.43 : x
  2. Step 2: Convert to fraction form
    138,631.62/207,947.43 = 54,431.43/x
  3. Step 3: Cross multiply
    138,631.62x = 207,947.43 × 54,431.43
  4. Step 4: Simplify right side
    138,631.62x = 11,318,875,979.72
  5. Step 5: Solve for x
    x = 11,318,875,979.72/138,631.62
  6. Step 6: Final answer
    x = 81,647.15

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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.