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Finding the Fourth Proportional to 139,368.54, 192,324.18 and 78,944.77

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Solution

The fourth proportional to 139,368.54, 192,324.18 and 78,944.77 is: 108,941.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,368.54 : 192,324.18 = 78,944.77 : x
  2. Step 2: Convert to fraction form
    139,368.54/192,324.18 = 78,944.77/x
  3. Step 3: Cross multiply
    139,368.54x = 192,324.18 × 78,944.77
  4. Step 4: Simplify right side
    139,368.54x = 15,182,988,155.54
  5. Step 5: Solve for x
    x = 15,182,988,155.54/139,368.54
  6. Step 6: Final answer
    x = 108,941.29

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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.