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Finding the Fourth Proportional to 66,416.49, 91,654.81 and 36,201.20

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Solution

The fourth proportional to 66,416.49, 91,654.81 and 36,201.20 is: 49,957.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,416.49 : 91,654.81 = 36,201.20 : x
  2. Step 2: Convert to fraction form
    66,416.49/91,654.81 = 36,201.20/x
  3. Step 3: Cross multiply
    66,416.49x = 91,654.81 × 36,201.20
  4. Step 4: Simplify right side
    66,416.49x = 3,318,013,558.99
  5. Step 5: Solve for x
    x = 3,318,013,558.99/66,416.49
  6. Step 6: Final answer
    x = 49,957.68

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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.