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Finding the Fourth Proportional to 69,812.80, 104,719.20 and 62,231.20

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Solution

The fourth proportional to 69,812.80, 104,719.20 and 62,231.20 is: 93,346.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,812.80 : 104,719.20 = 62,231.20 : x
  2. Step 2: Convert to fraction form
    69,812.80/104,719.20 = 62,231.20/x
  3. Step 3: Cross multiply
    69,812.80x = 104,719.20 × 62,231.20
  4. Step 4: Simplify right side
    69,812.80x = 6,516,801,479.04
  5. Step 5: Solve for x
    x = 6,516,801,479.04/69,812.80
  6. Step 6: Final answer
    x = 93,346.80

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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.