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Finding the Fourth Proportional to 66,640.91, 91,955.58 and 42,799.88

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Solution

The fourth proportional to 66,640.91, 91,955.58 and 42,799.88 is: 59,058.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,640.91 : 91,955.58 = 42,799.88 : x
  2. Step 2: Convert to fraction form
    66,640.91/91,955.58 = 42,799.88/x
  3. Step 3: Cross multiply
    66,640.91x = 91,955.58 × 42,799.88
  4. Step 4: Simplify right side
    66,640.91x = 3,935,687,789.33
  5. Step 5: Solve for x
    x = 3,935,687,789.33/66,640.91
  6. Step 6: Final answer
    x = 59,058.13

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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.