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Finding the Fourth Proportional to 66,221.55, 91,383.22 and 36,006.89

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Solution

The fourth proportional to 66,221.55, 91,383.22 and 36,006.89 is: 49,688.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,221.55 : 91,383.22 = 36,006.89 : x
  2. Step 2: Convert to fraction form
    66,221.55/91,383.22 = 36,006.89/x
  3. Step 3: Cross multiply
    66,221.55x = 91,383.22 × 36,006.89
  4. Step 4: Simplify right side
    66,221.55x = 3,290,425,550.39
  5. Step 5: Solve for x
    x = 3,290,425,550.39/66,221.55
  6. Step 6: Final answer
    x = 49,688.14

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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.