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Finding the Fourth Proportional to 139,553.90, 209,330.85 and 133,138.70

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Solution

The fourth proportional to 139,553.90, 209,330.85 and 133,138.70 is: 199,708.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,553.90 : 209,330.85 = 133,138.70 : x
  2. Step 2: Convert to fraction form
    139,553.90/209,330.85 = 133,138.70/x
  3. Step 3: Cross multiply
    139,553.90x = 209,330.85 × 133,138.70
  4. Step 4: Simplify right side
    139,553.90x = 27,870,037,238.90
  5. Step 5: Solve for x
    x = 27,870,037,238.90/139,553.90
  6. Step 6: Final answer
    x = 199,708.05

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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.