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Finding the Fourth Proportional to 69,618.48, 104,427.72 and 66,644.16

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Solution

The fourth proportional to 69,618.48, 104,427.72 and 66,644.16 is: 99,966.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,618.48 : 104,427.72 = 66,644.16 : x
  2. Step 2: Convert to fraction form
    69,618.48/104,427.72 = 66,644.16/x
  3. Step 3: Cross multiply
    69,618.48x = 104,427.72 × 66,644.16
  4. Step 4: Simplify right side
    69,618.48x = 6,959,497,680.12
  5. Step 5: Solve for x
    x = 6,959,497,680.12/69,618.48
  6. Step 6: Final answer
    x = 99,966.24

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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.