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Finding the Fourth Proportional to 66,606.78, 91,958.36 and 42,775.46

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Solution

The fourth proportional to 66,606.78, 91,958.36 and 42,775.46 is: 59,056.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,606.78 : 91,958.36 = 42,775.46 : x
  2. Step 2: Convert to fraction form
    66,606.78/91,958.36 = 42,775.46/x
  3. Step 3: Cross multiply
    66,606.78x = 91,958.36 × 42,775.46
  4. Step 4: Simplify right side
    66,606.78x = 3,933,561,149.85
  5. Step 5: Solve for x
    x = 3,933,561,149.85/66,606.78
  6. Step 6: Final answer
    x = 59,056.47

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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.