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Finding the Fourth Proportional to 151,718.40, 208,310.40 and 123,206.40

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Solution

The fourth proportional to 151,718.40, 208,310.40 and 123,206.40 is: 169,163.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,718.40 : 208,310.40 = 123,206.40 : x
  2. Step 2: Convert to fraction form
    151,718.40/208,310.40 = 123,206.40/x
  3. Step 3: Cross multiply
    151,718.40x = 208,310.40 × 123,206.40
  4. Step 4: Simplify right side
    151,718.40x = 25,665,174,466.56
  5. Step 5: Solve for x
    x = 25,665,174,466.56/151,718.40
  6. Step 6: Final answer
    x = 169,163.23

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.