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Finding the Fourth Proportional to 135,078.40, 202,398.90 and 127,205.20

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Solution

The fourth proportional to 135,078.40, 202,398.90 and 127,205.20 is: 190,601.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,078.40 : 202,398.90 = 127,205.20 : x
  2. Step 2: Convert to fraction form
    135,078.40/202,398.90 = 127,205.20/x
  3. Step 3: Cross multiply
    135,078.40x = 202,398.90 × 127,205.20
  4. Step 4: Simplify right side
    135,078.40x = 25,746,192,554.28
  5. Step 5: Solve for x
    x = 25,746,192,554.28/135,078.40
  6. Step 6: Final answer
    x = 190,601.85

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1.5x scale

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.