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Finding the Fourth Proportional to 77,245.53, 115,732.02 and 67,650.79

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Solution

The fourth proportional to 77,245.53, 115,732.02 and 67,650.79 is: 101,356.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,245.53 : 115,732.02 = 67,650.79 : x
  2. Step 2: Convert to fraction form
    77,245.53/115,732.02 = 67,650.79/x
  3. Step 3: Cross multiply
    77,245.53x = 115,732.02 × 67,650.79
  4. Step 4: Simplify right side
    77,245.53x = 7,829,362,002.64
  5. Step 5: Solve for x
    x = 7,829,362,002.64/77,245.53
  6. Step 6: Final answer
    x = 101,356.83

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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.