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Finding the Fourth Proportional to 139,459.14, 192,445.74 and 75,796.47

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Solution

The fourth proportional to 139,459.14, 192,445.74 and 75,796.47 is: 104,594.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,459.14 : 192,445.74 = 75,796.47 : x
  2. Step 2: Convert to fraction form
    139,459.14/192,445.74 = 75,796.47/x
  3. Step 3: Cross multiply
    139,459.14x = 192,445.74 × 75,796.47
  4. Step 4: Simplify right side
    139,459.14x = 14,586,707,758.54
  5. Step 5: Solve for x
    x = 14,586,707,758.54/139,459.14
  6. Step 6: Final answer
    x = 104,594.85

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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.