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Finding the Fourth Proportional to 123,889.12, 185,809.68 and 35,121.28

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Solution

The fourth proportional to 123,889.12, 185,809.68 and 35,121.28 is: 52,675.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,889.12 : 185,809.68 = 35,121.28 : x
  2. Step 2: Convert to fraction form
    123,889.12/185,809.68 = 35,121.28/x
  3. Step 3: Cross multiply
    123,889.12x = 185,809.68 × 35,121.28
  4. Step 4: Simplify right side
    123,889.12x = 6,525,873,797.99
  5. Step 5: Solve for x
    x = 6,525,873,797.99/123,889.12
  6. Step 6: Final answer
    x = 52,675.12

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.