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Finding the Fourth Proportional to 139,285.28, 192,208.44 and 75,621.72

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Solution

The fourth proportional to 139,285.28, 192,208.44 and 75,621.72 is: 104,355.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,285.28 : 192,208.44 = 75,621.72 : x
  2. Step 2: Convert to fraction form
    139,285.28/192,208.44 = 75,621.72/x
  3. Step 3: Cross multiply
    139,285.28x = 192,208.44 × 75,621.72
  4. Step 4: Simplify right side
    139,285.28x = 14,535,132,831.32
  5. Step 5: Solve for x
    x = 14,535,132,831.32/139,285.28
  6. Step 6: Final answer
    x = 104,355.13

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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.