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Finding the Fourth Proportional to 139,471.17, 192,470.48 and 75,808.81

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Solution

The fourth proportional to 139,471.17, 192,470.48 and 75,808.81 is: 104,616.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,471.17 : 192,470.48 = 75,808.81 : x
  2. Step 2: Convert to fraction form
    139,471.17/192,470.48 = 75,808.81/x
  3. Step 3: Cross multiply
    139,471.17x = 192,470.48 × 75,808.81
  4. Step 4: Simplify right side
    139,471.17x = 14,590,958,048.93
  5. Step 5: Solve for x
    x = 14,590,958,048.93/139,471.17
  6. Step 6: Final answer
    x = 104,616.30

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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.