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Finding the Fourth Proportional to 66,486.15, 99,646.07 and 33,215.54

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Solution

The fourth proportional to 66,486.15, 99,646.07 and 33,215.54 is: 49,781.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,486.15 : 99,646.07 = 33,215.54 : x
  2. Step 2: Convert to fraction form
    66,486.15/99,646.07 = 33,215.54/x
  3. Step 3: Cross multiply
    66,486.15x = 99,646.07 × 33,215.54
  4. Step 4: Simplify right side
    66,486.15x = 3,309,797,359.62
  5. Step 5: Solve for x
    x = 3,309,797,359.62/66,486.15
  6. Step 6: Final answer
    x = 49,781.76

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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.