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Finding the Fourth Proportional to 138,889.53, 207,120.28 and 123,580.53

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Solution

The fourth proportional to 138,889.53, 207,120.28 and 123,580.53 is: 184,290.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,889.53 : 207,120.28 = 123,580.53 : x
  2. Step 2: Convert to fraction form
    138,889.53/207,120.28 = 123,580.53/x
  3. Step 3: Cross multiply
    138,889.53x = 207,120.28 × 123,580.53
  4. Step 4: Simplify right side
    138,889.53x = 25,596,033,976.15
  5. Step 5: Solve for x
    x = 25,596,033,976.15/138,889.53
  6. Step 6: Final answer
    x = 184,290.59

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.