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Finding the Fourth Proportional to 101,039.95, 139,431.93 and 55,719.84

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Solution

The fourth proportional to 101,039.95, 139,431.93 and 55,719.84 is: 76,891.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,039.95 : 139,431.93 = 55,719.84 : x
  2. Step 2: Convert to fraction form
    101,039.95/139,431.93 = 55,719.84/x
  3. Step 3: Cross multiply
    101,039.95x = 139,431.93 × 55,719.84
  4. Step 4: Simplify right side
    101,039.95x = 7,769,124,830.49
  5. Step 5: Solve for x
    x = 7,769,124,830.49/101,039.95
  6. Step 6: Final answer
    x = 76,891.61

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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.