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Finding the Fourth Proportional to 139,273.71, 192,202.35 and 78,843.12

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Solution

The fourth proportional to 139,273.71, 192,202.35 and 78,843.12 is: 108,806.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,273.71 : 192,202.35 = 78,843.12 : x
  2. Step 2: Convert to fraction form
    139,273.71/192,202.35 = 78,843.12/x
  3. Step 3: Cross multiply
    139,273.71x = 192,202.35 × 78,843.12
  4. Step 4: Simplify right side
    139,273.71x = 15,153,832,945.33
  5. Step 5: Solve for x
    x = 15,153,832,945.33/139,273.71
  6. Step 6: Final answer
    x = 108,806.13

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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.