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Finding the Fourth Proportional to 139,553.80, 192,502 and 87,788.36

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Solution

The fourth proportional to 139,553.80, 192,502 and 87,788.36 is: 121,096.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,553.80 : 192,502 = 87,788.36 : x
  2. Step 2: Convert to fraction form
    139,553.80/192,502 = 87,788.36/x
  3. Step 3: Cross multiply
    139,553.80x = 192,502 × 87,788.36
  4. Step 4: Simplify right side
    139,553.80x = 16,899,434,876.72
  5. Step 5: Solve for x
    x = 16,899,434,876.72/139,553.80
  6. Step 6: Final answer
    x = 121,096.20

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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.