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Finding the Fourth Proportional to 66,221.82, 91,387.80 and 36,009.18

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Solution

The fourth proportional to 66,221.82, 91,387.80 and 36,009.18 is: 49,693.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,221.82 : 91,387.80 = 36,009.18 : x
  2. Step 2: Convert to fraction form
    66,221.82/91,387.80 = 36,009.18/x
  3. Step 3: Cross multiply
    66,221.82x = 91,387.80 × 36,009.18
  4. Step 4: Simplify right side
    66,221.82x = 3,290,799,740.00
  5. Step 5: Solve for x
    x = 3,290,799,740.00/66,221.82
  6. Step 6: Final answer
    x = 49,693.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.