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Finding the Fourth Proportional to 139,342.56, 192,294.48 and 75,681.44

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Solution

The fourth proportional to 139,342.56, 192,294.48 and 75,681.44 is: 104,441.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,342.56 : 192,294.48 = 75,681.44 : x
  2. Step 2: Convert to fraction form
    139,342.56/192,294.48 = 75,681.44/x
  3. Step 3: Cross multiply
    139,342.56x = 192,294.48 × 75,681.44
  4. Step 4: Simplify right side
    139,342.56x = 14,553,123,150.45
  5. Step 5: Solve for x
    x = 14,553,123,150.45/139,342.56
  6. Step 6: Final answer
    x = 104,441.34

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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.