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Finding the Fourth Proportional to 71,768.80, 107,458.80 and 56,216.80

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Solution

The fourth proportional to 71,768.80, 107,458.80 and 56,216.80 is: 84,172.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,768.80 : 107,458.80 = 56,216.80 : x
  2. Step 2: Convert to fraction form
    71,768.80/107,458.80 = 56,216.80/x
  3. Step 3: Cross multiply
    71,768.80x = 107,458.80 × 56,216.80
  4. Step 4: Simplify right side
    71,768.80x = 6,040,989,867.84
  5. Step 5: Solve for x
    x = 6,040,989,867.84/71,768.80
  6. Step 6: Final answer
    x = 84,172.93

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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.