Home / 85,309.12-127,971.36-22,978.24

Finding the Fourth Proportional to 85,309.12, 127,971.36 and 22,978.24

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Solution

The fourth proportional to 85,309.12, 127,971.36 and 22,978.24 is: 34,469.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,309.12 : 127,971.36 = 22,978.24 : x
  2. Step 2: Convert to fraction form
    85,309.12/127,971.36 = 22,978.24/x
  3. Step 3: Cross multiply
    85,309.12x = 127,971.36 × 22,978.24
  4. Step 4: Simplify right side
    85,309.12x = 2,940,556,623.21
  5. Step 5: Solve for x
    x = 2,940,556,623.21/85,309.12
  6. Step 6: Final answer
    x = 34,469.43

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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.