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Finding the Fourth Proportional to 101,311.29, 139,812.36 and 55,992.21

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Solution

The fourth proportional to 101,311.29, 139,812.36 and 55,992.21 is: 77,270.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,311.29 : 139,812.36 = 55,992.21 : x
  2. Step 2: Convert to fraction form
    101,311.29/139,812.36 = 55,992.21/x
  3. Step 3: Cross multiply
    101,311.29x = 139,812.36 × 55,992.21
  4. Step 4: Simplify right side
    101,311.29x = 7,828,403,021.72
  5. Step 5: Solve for x
    x = 7,828,403,021.72/101,311.29
  6. Step 6: Final answer
    x = 77,270.79

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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.