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Finding the Fourth Proportional to 66,492.72, 91,747.37 and 39,637.76

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Solution

The fourth proportional to 66,492.72, 91,747.37 and 39,637.76 is: 54,692.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,492.72 : 91,747.37 = 39,637.76 : x
  2. Step 2: Convert to fraction form
    66,492.72/91,747.37 = 39,637.76/x
  3. Step 3: Cross multiply
    66,492.72x = 91,747.37 × 39,637.76
  4. Step 4: Simplify right side
    66,492.72x = 3,636,659,873.05
  5. Step 5: Solve for x
    x = 3,636,659,873.05/66,492.72
  6. Step 6: Final answer
    x = 54,692.60

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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.