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Finding the Fourth Proportional to 109,323.20, 163,984.80 and 71,998.40

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Solution

The fourth proportional to 109,323.20, 163,984.80 and 71,998.40 is: 107,997.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,323.20 : 163,984.80 = 71,998.40 : x
  2. Step 2: Convert to fraction form
    109,323.20/163,984.80 = 71,998.40/x
  3. Step 3: Cross multiply
    109,323.20x = 163,984.80 × 71,998.40
  4. Step 4: Simplify right side
    109,323.20x = 11,806,643,224.32
  5. Step 5: Solve for x
    x = 11,806,643,224.32/109,323.20
  6. Step 6: Final answer
    x = 107,997.60

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Similar ratio
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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.