Home / 125,979.20-188,968.80-90,549.80

Finding the Fourth Proportional to 125,979.20, 188,968.80 and 90,549.80

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Solution

The fourth proportional to 125,979.20, 188,968.80 and 90,549.80 is: 135,824.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,979.20 : 188,968.80 = 90,549.80 : x
  2. Step 2: Convert to fraction form
    125,979.20/188,968.80 = 90,549.80/x
  3. Step 3: Cross multiply
    125,979.20x = 188,968.80 × 90,549.80
  4. Step 4: Simplify right side
    125,979.20x = 17,111,087,046.24
  5. Step 5: Solve for x
    x = 17,111,087,046.24/125,979.20
  6. Step 6: Final answer
    x = 135,824.70

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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.