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Finding the Fourth Proportional to 139,281.28, 192,202.92 and 75,617.70

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Solution

The fourth proportional to 139,281.28, 192,202.92 and 75,617.70 is: 104,349.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,281.28 : 192,202.92 = 75,617.70 : x
  2. Step 2: Convert to fraction form
    139,281.28/192,202.92 = 75,617.70/x
  3. Step 3: Cross multiply
    139,281.28x = 192,202.92 × 75,617.70
  4. Step 4: Simplify right side
    139,281.28x = 14,533,942,743.68
  5. Step 5: Solve for x
    x = 14,533,942,743.68/139,281.28
  6. Step 6: Final answer
    x = 104,349.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.