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Finding the Fourth Proportional to 139,086.36, 191,939.28 and 75,424.14

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Solution

The fourth proportional to 139,086.36, 191,939.28 and 75,424.14 is: 104,085.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,086.36 : 191,939.28 = 75,424.14 : x
  2. Step 2: Convert to fraction form
    139,086.36/191,939.28 = 75,424.14/x
  3. Step 3: Cross multiply
    139,086.36x = 191,939.28 × 75,424.14
  4. Step 4: Simplify right side
    139,086.36x = 14,476,855,126.22
  5. Step 5: Solve for x
    x = 14,476,855,126.22/139,086.36
  6. Step 6: Final answer
    x = 104,085.37

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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.