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Finding the Fourth Proportional to 61,651.84, 85,056.78 and 40,459.90

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Solution

The fourth proportional to 61,651.84, 85,056.78 and 40,459.90 is: 55,819.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,651.84 : 85,056.78 = 40,459.90 : x
  2. Step 2: Convert to fraction form
    61,651.84/85,056.78 = 40,459.90/x
  3. Step 3: Cross multiply
    61,651.84x = 85,056.78 × 40,459.90
  4. Step 4: Simplify right side
    61,651.84x = 3,441,388,813.12
  5. Step 5: Solve for x
    x = 3,441,388,813.12/61,651.84
  6. Step 6: Final answer
    x = 55,819.73

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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.