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Finding the Fourth Proportional to 61,137.10, 91,705.65 and 43,422.40

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Solution

The fourth proportional to 61,137.10, 91,705.65 and 43,422.40 is: 65,133.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,137.10 : 91,705.65 = 43,422.40 : x
  2. Step 2: Convert to fraction form
    61,137.10/91,705.65 = 43,422.40/x
  3. Step 3: Cross multiply
    61,137.10x = 91,705.65 × 43,422.40
  4. Step 4: Simplify right side
    61,137.10x = 3,982,079,416.56
  5. Step 5: Solve for x
    x = 3,982,079,416.56/61,137.10
  6. Step 6: Final answer
    x = 65,133.60

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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.