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Finding the Fourth Proportional to 66,021.62, 91,049.01 and 61,252.34

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Solution

The fourth proportional to 66,021.62, 91,049.01 and 61,252.34 is: 84,471.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,021.62 : 91,049.01 = 61,252.34 : x
  2. Step 2: Convert to fraction form
    66,021.62/91,049.01 = 61,252.34/x
  3. Step 3: Cross multiply
    66,021.62x = 91,049.01 × 61,252.34
  4. Step 4: Simplify right side
    66,021.62x = 5,576,964,917.18
  5. Step 5: Solve for x
    x = 5,576,964,917.18/66,021.62
  6. Step 6: Final answer
    x = 84,471.80

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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.