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Finding the Fourth Proportional to 139,574.70, 192,615.53 and 75,912.93

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Solution

The fourth proportional to 139,574.70, 192,615.53 and 75,912.93 is: 104,761.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,574.70 : 192,615.53 = 75,912.93 : x
  2. Step 2: Convert to fraction form
    139,574.70/192,615.53 = 75,912.93/x
  3. Step 3: Cross multiply
    139,574.70x = 192,615.53 × 75,912.93
  4. Step 4: Simplify right side
    139,574.70x = 14,622,008,866.24
  5. Step 5: Solve for x
    x = 14,622,008,866.24/139,574.70
  6. Step 6: Final answer
    x = 104,761.17

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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.