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Finding the Fourth Proportional to 66,494.66, 91,774.50 and 39,638.88

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Solution

The fourth proportional to 66,494.66, 91,774.50 and 39,638.88 is: 54,708.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,494.66 : 91,774.50 = 39,638.88 : x
  2. Step 2: Convert to fraction form
    66,494.66/91,774.50 = 39,638.88/x
  3. Step 3: Cross multiply
    66,494.66x = 91,774.50 × 39,638.88
  4. Step 4: Simplify right side
    66,494.66x = 3,637,838,392.56
  5. Step 5: Solve for x
    x = 3,637,838,392.56/66,494.66
  6. Step 6: Final answer
    x = 54,708.73

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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.