Home / 109,324.20-163,986.30-71,999.40

Finding the Fourth Proportional to 109,324.20, 163,986.30 and 71,999.40

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Solution

The fourth proportional to 109,324.20, 163,986.30 and 71,999.40 is: 107,999.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,324.20 : 163,986.30 = 71,999.40 : x
  2. Step 2: Convert to fraction form
    109,324.20/163,986.30 = 71,999.40/x
  3. Step 3: Cross multiply
    109,324.20x = 163,986.30 × 71,999.40
  4. Step 4: Simplify right side
    109,324.20x = 11,806,915,208.22
  5. Step 5: Solve for x
    x = 11,806,915,208.22/109,324.20
  6. Step 6: Final answer
    x = 107,999.10

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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.