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Finding the Fourth Proportional to 70,664.20, 105,999.90 and 18,074.12

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Solution

The fourth proportional to 70,664.20, 105,999.90 and 18,074.12 is: 27,112.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,664.20 : 105,999.90 = 18,074.12 : x
  2. Step 2: Convert to fraction form
    70,664.20/105,999.90 = 18,074.12/x
  3. Step 3: Cross multiply
    70,664.20x = 105,999.90 × 18,074.12
  4. Step 4: Simplify right side
    70,664.20x = 1,915,854,912.59
  5. Step 5: Solve for x
    x = 1,915,854,912.59/70,664.20
  6. Step 6: Final answer
    x = 27,112.10

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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.