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Finding the Fourth Proportional to 66,289, 91,478.84 and 36,481

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Solution

The fourth proportional to 66,289, 91,478.84 and 36,481 is: 50,343.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,289 : 91,478.84 = 36,481 : x
  2. Step 2: Convert to fraction form
    66,289/91,478.84 = 36,481/x
  3. Step 3: Cross multiply
    66,289x = 91,478.84 × 36,481
  4. Step 4: Simplify right side
    66,289x = 3,337,239,562.04
  5. Step 5: Solve for x
    x = 3,337,239,562.04/66,289
  6. Step 6: Final answer
    x = 50,343.79

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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.