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Finding the Fourth Proportional to 61,220.20, 91,733.10 and 40,419.40

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Solution

The fourth proportional to 61,220.20, 91,733.10 and 40,419.40 is: 60,564.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,220.20 : 91,733.10 = 40,419.40 : x
  2. Step 2: Convert to fraction form
    61,220.20/91,733.10 = 40,419.40/x
  3. Step 3: Cross multiply
    61,220.20x = 91,733.10 × 40,419.40
  4. Step 4: Simplify right side
    61,220.20x = 3,707,796,862.14
  5. Step 5: Solve for x
    x = 3,707,796,862.14/61,220.20
  6. Step 6: Final answer
    x = 60,564.93

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.