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Finding the Fourth Proportional to 139,503.87, 192,189.92 and 96,988.59

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Solution

The fourth proportional to 139,503.87, 192,189.92 and 96,988.59 is: 133,618.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,503.87 : 192,189.92 = 96,988.59 : x
  2. Step 2: Convert to fraction form
    139,503.87/192,189.92 = 96,988.59/x
  3. Step 3: Cross multiply
    139,503.87x = 192,189.92 × 96,988.59
  4. Step 4: Simplify right side
    139,503.87x = 18,640,228,868.07
  5. Step 5: Solve for x
    x = 18,640,228,868.07/139,503.87
  6. Step 6: Final answer
    x = 133,618.01

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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.