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Finding the Fourth Proportional to 139,246.20, 208,682.20 and 75,971.51

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Solution

The fourth proportional to 139,246.20, 208,682.20 and 75,971.51 is: 113,855.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,246.20 : 208,682.20 = 75,971.51 : x
  2. Step 2: Convert to fraction form
    139,246.20/208,682.20 = 75,971.51/x
  3. Step 3: Cross multiply
    139,246.20x = 208,682.20 × 75,971.51
  4. Step 4: Simplify right side
    139,246.20x = 15,853,900,610.78
  5. Step 5: Solve for x
    x = 15,853,900,610.78/139,246.20
  6. Step 6: Final answer
    x = 113,855.18

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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.