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Finding the Fourth Proportional to 53,978.40, 80,870.40 and 50,725.44

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Solution

The fourth proportional to 53,978.40, 80,870.40 and 50,725.44 is: 75,996.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,978.40 : 80,870.40 = 50,725.44 : x
  2. Step 2: Convert to fraction form
    53,978.40/80,870.40 = 50,725.44/x
  3. Step 3: Cross multiply
    53,978.40x = 80,870.40 × 50,725.44
  4. Step 4: Simplify right side
    53,978.40x = 4,102,186,622.98
  5. Step 5: Solve for x
    x = 4,102,186,622.98/53,978.40
  6. Step 6: Final answer
    x = 75,996.82

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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.