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Finding the Fourth Proportional to 69,828.80, 96,356.64 and 39,615.68

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Solution

The fourth proportional to 69,828.80, 96,356.64 and 39,615.68 is: 54,665.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,828.80 : 96,356.64 = 39,615.68 : x
  2. Step 2: Convert to fraction form
    69,828.80/96,356.64 = 39,615.68/x
  3. Step 3: Cross multiply
    69,828.80x = 96,356.64 × 39,615.68
  4. Step 4: Simplify right side
    69,828.80x = 3,817,233,816.12
  5. Step 5: Solve for x
    x = 3,817,233,816.12/69,828.80
  6. Step 6: Final answer
    x = 54,665.61

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.