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Finding the Fourth Proportional to 61,376.80, 91,935.60 and 54,810.40

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Solution

The fourth proportional to 61,376.80, 91,935.60 and 54,810.40 is: 82,099.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,376.80 : 91,935.60 = 54,810.40 : x
  2. Step 2: Convert to fraction form
    61,376.80/91,935.60 = 54,810.40/x
  3. Step 3: Cross multiply
    61,376.80x = 91,935.60 × 54,810.40
  4. Step 4: Simplify right side
    61,376.80x = 5,039,027,010.24
  5. Step 5: Solve for x
    x = 5,039,027,010.24/61,376.80
  6. Step 6: Final answer
    x = 82,099.87

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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.