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Finding the Fourth Proportional to 139,605.54, 192,657.96 and 75,943.68

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Solution

The fourth proportional to 139,605.54, 192,657.96 and 75,943.68 is: 104,803.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,605.54 : 192,657.96 = 75,943.68 : x
  2. Step 2: Convert to fraction form
    139,605.54/192,657.96 = 75,943.68/x
  3. Step 3: Cross multiply
    139,605.54x = 192,657.96 × 75,943.68
  4. Step 4: Simplify right side
    139,605.54x = 14,631,154,463.69
  5. Step 5: Solve for x
    x = 14,631,154,463.69/139,605.54
  6. Step 6: Final answer
    x = 104,803.54

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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.