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Finding the Fourth Proportional to 76,424.40, 114,539.40 and 68,065.20

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Solution

The fourth proportional to 76,424.40, 114,539.40 and 68,065.20 is: 102,011.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,424.40 : 114,539.40 = 68,065.20 : x
  2. Step 2: Convert to fraction form
    76,424.40/114,539.40 = 68,065.20/x
  3. Step 3: Cross multiply
    76,424.40x = 114,539.40 × 68,065.20
  4. Step 4: Simplify right side
    76,424.40x = 7,796,147,168.88
  5. Step 5: Solve for x
    x = 7,796,147,168.88/76,424.40
  6. Step 6: Final answer
    x = 102,011.23

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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.