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Finding the Fourth Proportional to 139,951.74, 193,138.65 and 79,532.67

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Solution

The fourth proportional to 139,951.74, 193,138.65 and 79,532.67 is: 109,758.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,951.74 : 193,138.65 = 79,532.67 : x
  2. Step 2: Convert to fraction form
    139,951.74/193,138.65 = 79,532.67/x
  3. Step 3: Cross multiply
    139,951.74x = 193,138.65 × 79,532.67
  4. Step 4: Simplify right side
    139,951.74x = 15,360,832,514.70
  5. Step 5: Solve for x
    x = 15,360,832,514.70/139,951.74
  6. Step 6: Final answer
    x = 109,758.07

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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.