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Finding the Fourth Proportional to 101,072.60, 139,478.40 and 55,754.72

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Solution

The fourth proportional to 101,072.60, 139,478.40 and 55,754.72 is: 76,940.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,072.60 : 139,478.40 = 55,754.72 : x
  2. Step 2: Convert to fraction form
    101,072.60/139,478.40 = 55,754.72/x
  3. Step 3: Cross multiply
    101,072.60x = 139,478.40 × 55,754.72
  4. Step 4: Simplify right side
    101,072.60x = 7,776,579,138.05
  5. Step 5: Solve for x
    x = 7,776,579,138.05/101,072.60
  6. Step 6: Final answer
    x = 76,940.53

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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.