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Finding the Fourth Proportional to 85,246.80, 127,724.40 and 54,045.60

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Solution

The fourth proportional to 85,246.80, 127,724.40 and 54,045.60 is: 80,975.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,246.80 : 127,724.40 = 54,045.60 : x
  2. Step 2: Convert to fraction form
    85,246.80/127,724.40 = 54,045.60/x
  3. Step 3: Cross multiply
    85,246.80x = 127,724.40 × 54,045.60
  4. Step 4: Simplify right side
    85,246.80x = 6,902,941,832.64
  5. Step 5: Solve for x
    x = 6,902,941,832.64/85,246.80
  6. Step 6: Final answer
    x = 80,975.96

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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.