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Finding the Fourth Proportional to 101,338.72, 139,844.68 and 56,013.52

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Solution

The fourth proportional to 101,338.72, 139,844.68 and 56,013.52 is: 77,297.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,338.72 : 139,844.68 = 56,013.52 : x
  2. Step 2: Convert to fraction form
    101,338.72/139,844.68 = 56,013.52/x
  3. Step 3: Cross multiply
    101,338.72x = 139,844.68 × 56,013.52
  4. Step 4: Simplify right side
    101,338.72x = 7,833,192,780.07
  5. Step 5: Solve for x
    x = 7,833,192,780.07/101,338.72
  6. Step 6: Final answer
    x = 77,297.14

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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.