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Finding the Fourth Proportional to 139,085.28, 207,609.60 and 119,489.76

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Solution

The fourth proportional to 139,085.28, 207,609.60 and 119,489.76 is: 178,359.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,085.28 : 207,609.60 = 119,489.76 : x
  2. Step 2: Convert to fraction form
    139,085.28/207,609.60 = 119,489.76/x
  3. Step 3: Cross multiply
    139,085.28x = 207,609.60 × 119,489.76
  4. Step 4: Simplify right side
    139,085.28x = 24,807,221,277.70
  5. Step 5: Solve for x
    x = 24,807,221,277.70/139,085.28
  6. Step 6: Final answer
    x = 178,359.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.