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Finding the Fourth Proportional to 139,245.32, 208,680.89 and 75,970.63

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Solution

The fourth proportional to 139,245.32, 208,680.89 and 75,970.63 is: 113,853.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,245.32 : 208,680.89 = 75,970.63 : x
  2. Step 2: Convert to fraction form
    139,245.32/208,680.89 = 75,970.63/x
  3. Step 3: Cross multiply
    139,245.32x = 208,680.89 × 75,970.63
  4. Step 4: Simplify right side
    139,245.32x = 15,853,618,682.26
  5. Step 5: Solve for x
    x = 15,853,618,682.26/139,245.32
  6. Step 6: Final answer
    x = 113,853.87

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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.