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Finding the Fourth Proportional to 68,624.80, 102,937.20 and 19,376.80

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Solution

The fourth proportional to 68,624.80, 102,937.20 and 19,376.80 is: 29,065.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,624.80 : 102,937.20 = 19,376.80 : x
  2. Step 2: Convert to fraction form
    68,624.80/102,937.20 = 19,376.80/x
  3. Step 3: Cross multiply
    68,624.80x = 102,937.20 × 19,376.80
  4. Step 4: Simplify right side
    68,624.80x = 1,994,593,536.96
  5. Step 5: Solve for x
    x = 1,994,593,536.96/68,624.80
  6. Step 6: Final answer
    x = 29,065.20

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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.