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Finding the Fourth Proportional to 66,899.12, 100,348.44 and 20,155.76

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Solution

The fourth proportional to 66,899.12, 100,348.44 and 20,155.76 is: 30,233.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,899.12 : 100,348.44 = 20,155.76 : x
  2. Step 2: Convert to fraction form
    66,899.12/100,348.44 = 20,155.76/x
  3. Step 3: Cross multiply
    66,899.12x = 100,348.44 × 20,155.76
  4. Step 4: Simplify right side
    66,899.12x = 2,022,599,073.01
  5. Step 5: Solve for x
    x = 2,022,599,073.01/66,899.12
  6. Step 6: Final answer
    x = 30,233.57

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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.