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Finding the Fourth Proportional to 101,039.84, 139,431.76 and 55,719.73

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Solution

The fourth proportional to 101,039.84, 139,431.76 and 55,719.73 is: 76,891.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,039.84 : 139,431.76 = 55,719.73 : x
  2. Step 2: Convert to fraction form
    101,039.84/139,431.76 = 55,719.73/x
  3. Step 3: Cross multiply
    101,039.84x = 139,431.76 × 55,719.73
  4. Step 4: Simplify right side
    101,039.84x = 7,769,099,323.47
  5. Step 5: Solve for x
    x = 7,769,099,323.47/101,039.84
  6. Step 6: Final answer
    x = 76,891.45

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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.