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Finding the Fourth Proportional to 66,493.41, 91,748.35 and 39,638.41

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Solution

The fourth proportional to 66,493.41, 91,748.35 and 39,638.41 is: 54,693.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,493.41 : 91,748.35 = 39,638.41 : x
  2. Step 2: Convert to fraction form
    66,493.41/91,748.35 = 39,638.41/x
  3. Step 3: Cross multiply
    66,493.41x = 91,748.35 × 39,638.41
  4. Step 4: Simplify right side
    66,493.41x = 3,636,758,827.42
  5. Step 5: Solve for x
    x = 3,636,758,827.42/66,493.41
  6. Step 6: Final answer
    x = 54,693.53

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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.