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Finding the Fourth Proportional to 66,642.94, 91,958.35 and 42,801.91

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Solution

The fourth proportional to 66,642.94, 91,958.35 and 42,801.91 is: 59,060.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,642.94 : 91,958.35 = 42,801.91 : x
  2. Step 2: Convert to fraction form
    66,642.94/91,958.35 = 42,801.91/x
  3. Step 3: Cross multiply
    66,642.94x = 91,958.35 × 42,801.91
  4. Step 4: Simplify right side
    66,642.94x = 3,935,992,560.66
  5. Step 5: Solve for x
    x = 3,935,992,560.66/66,642.94
  6. Step 6: Final answer
    x = 59,060.91

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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.