Home / 115,314.20-172,971.30-91,986.20

Finding the Fourth Proportional to 115,314.20, 172,971.30 and 91,986.20

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Solution

The fourth proportional to 115,314.20, 172,971.30 and 91,986.20 is: 137,979.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,314.20 : 172,971.30 = 91,986.20 : x
  2. Step 2: Convert to fraction form
    115,314.20/172,971.30 = 91,986.20/x
  3. Step 3: Cross multiply
    115,314.20x = 172,971.30 × 91,986.20
  4. Step 4: Simplify right side
    115,314.20x = 15,910,972,596.06
  5. Step 5: Solve for x
    x = 15,910,972,596.06/115,314.20
  6. Step 6: Final answer
    x = 137,979.30

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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.