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Finding the Fourth Proportional to 101,231.91, 139,697.34 and 55,908.92

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Solution

The fourth proportional to 101,231.91, 139,697.34 and 55,908.92 is: 77,152.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,231.91 : 139,697.34 = 55,908.92 : x
  2. Step 2: Convert to fraction form
    101,231.91/139,697.34 = 55,908.92/x
  3. Step 3: Cross multiply
    101,231.91x = 139,697.34 × 55,908.92
  4. Step 4: Simplify right side
    101,231.91x = 7,810,326,707.79
  5. Step 5: Solve for x
    x = 7,810,326,707.79/101,231.91
  6. Step 6: Final answer
    x = 77,152.81

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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.