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Finding the Fourth Proportional to 139,646.53, 192,716.31 and 75,988.43

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Solution

The fourth proportional to 139,646.53, 192,716.31 and 75,988.43 is: 104,866.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,646.53 : 192,716.31 = 75,988.43 : x
  2. Step 2: Convert to fraction form
    139,646.53/192,716.31 = 75,988.43/x
  3. Step 3: Cross multiply
    139,646.53x = 192,716.31 × 75,988.43
  4. Step 4: Simplify right side
    139,646.53x = 14,644,209,876.35
  5. Step 5: Solve for x
    x = 14,644,209,876.35/139,646.53
  6. Step 6: Final answer
    x = 104,866.26

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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.