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Finding the Fourth Proportional to 61,137.60, 91,706.40 and 43,422.90

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Solution

The fourth proportional to 61,137.60, 91,706.40 and 43,422.90 is: 65,134.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,137.60 : 91,706.40 = 43,422.90 : x
  2. Step 2: Convert to fraction form
    61,137.60/91,706.40 = 43,422.90/x
  3. Step 3: Cross multiply
    61,137.60x = 91,706.40 × 43,422.90
  4. Step 4: Simplify right side
    61,137.60x = 3,982,157,836.56
  5. Step 5: Solve for x
    x = 3,982,157,836.56/61,137.60
  6. Step 6: Final answer
    x = 65,134.35

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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.