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Finding the Fourth Proportional to 248,910.80, 373,139.40 and 91,101.20

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Solution

The fourth proportional to 248,910.80, 373,139.40 and 91,101.20 is: 136,568.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    248,910.80 : 373,139.40 = 91,101.20 : x
  2. Step 2: Convert to fraction form
    248,910.80/373,139.40 = 91,101.20/x
  3. Step 3: Cross multiply
    248,910.80x = 373,139.40 × 91,101.20
  4. Step 4: Simplify right side
    248,910.80x = 33,993,447,107.28
  5. Step 5: Solve for x
    x = 33,993,447,107.28/248,910.80
  6. Step 6: Final answer
    x = 136,568.79

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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.