Home / 113,631.40-170,447.10-82,138.60

Finding the Fourth Proportional to 113,631.40, 170,447.10 and 82,138.60

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Solution

The fourth proportional to 113,631.40, 170,447.10 and 82,138.60 is: 123,207.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,631.40 : 170,447.10 = 82,138.60 : x
  2. Step 2: Convert to fraction form
    113,631.40/170,447.10 = 82,138.60/x
  3. Step 3: Cross multiply
    113,631.40x = 170,447.10 × 82,138.60
  4. Step 4: Simplify right side
    113,631.40x = 14,000,286,168.06
  5. Step 5: Solve for x
    x = 14,000,286,168.06/113,631.40
  6. Step 6: Final answer
    x = 123,207.90

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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.