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Finding the Fourth Proportional to 55,276.80, 82,915.20 and 40,243.20

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Solution

The fourth proportional to 55,276.80, 82,915.20 and 40,243.20 is: 60,364.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,276.80 : 82,915.20 = 40,243.20 : x
  2. Step 2: Convert to fraction form
    55,276.80/82,915.20 = 40,243.20/x
  3. Step 3: Cross multiply
    55,276.80x = 82,915.20 × 40,243.20
  4. Step 4: Simplify right side
    55,276.80x = 3,336,772,976.64
  5. Step 5: Solve for x
    x = 3,336,772,976.64/55,276.80
  6. Step 6: Final answer
    x = 60,364.80

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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.