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Finding the Fourth Proportional to 139,272, 192,195.56 and 75,609.80

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Solution

The fourth proportional to 139,272, 192,195.56 and 75,609.80 is: 104,341.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,272 : 192,195.56 = 75,609.80 : x
  2. Step 2: Convert to fraction form
    139,272/192,195.56 = 75,609.80/x
  3. Step 3: Cross multiply
    139,272x = 192,195.56 × 75,609.80
  4. Step 4: Simplify right side
    139,272x = 14,531,866,513.46
  5. Step 5: Solve for x
    x = 14,531,866,513.46/139,272
  6. Step 6: Final answer
    x = 104,341.62

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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.