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Finding the Fourth Proportional to 139,356.48, 192,315.52 and 75,697.92

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Solution

The fourth proportional to 139,356.48, 192,315.52 and 75,697.92 is: 104,465.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,356.48 : 192,315.52 = 75,697.92 : x
  2. Step 2: Convert to fraction form
    139,356.48/192,315.52 = 75,697.92/x
  3. Step 3: Cross multiply
    139,356.48x = 192,315.52 × 75,697.92
  4. Step 4: Simplify right side
    139,356.48x = 14,557,884,847.72
  5. Step 5: Solve for x
    x = 14,557,884,847.72/139,356.48
  6. Step 6: Final answer
    x = 104,465.07

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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.