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Finding the Fourth Proportional to 101,072.78, 139,474.10 and 55,750.65

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Solution

The fourth proportional to 101,072.78, 139,474.10 and 55,750.65 is: 76,932.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,072.78 : 139,474.10 = 55,750.65 : x
  2. Step 2: Convert to fraction form
    101,072.78/139,474.10 = 55,750.65/x
  3. Step 3: Cross multiply
    101,072.78x = 139,474.10 × 55,750.65
  4. Step 4: Simplify right side
    101,072.78x = 7,775,771,733.17
  5. Step 5: Solve for x
    x = 7,775,771,733.17/101,072.78
  6. Step 6: Final answer
    x = 76,932.40

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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.