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Finding the Fourth Proportional to 101,231.65, 139,697 and 55,908.66

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Solution

The fourth proportional to 101,231.65, 139,697 and 55,908.66 is: 77,152.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,231.65 : 139,697 = 55,908.66 : x
  2. Step 2: Convert to fraction form
    101,231.65/139,697 = 55,908.66/x
  3. Step 3: Cross multiply
    101,231.65x = 139,697 × 55,908.66
  4. Step 4: Simplify right side
    101,231.65x = 7,810,272,076.02
  5. Step 5: Solve for x
    x = 7,810,272,076.02/101,231.65
  6. Step 6: Final answer
    x = 77,152.47

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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.