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Finding the Fourth Proportional to 68,661.25, 102,477.08 and 64,177.21

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Solution

The fourth proportional to 68,661.25, 102,477.08 and 64,177.21 is: 95,784.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,661.25 : 102,477.08 = 64,177.21 : x
  2. Step 2: Convert to fraction form
    68,661.25/102,477.08 = 64,177.21/x
  3. Step 3: Cross multiply
    68,661.25x = 102,477.08 × 64,177.21
  4. Step 4: Simplify right side
    68,661.25x = 6,576,693,083.35
  5. Step 5: Solve for x
    x = 6,576,693,083.35/68,661.25
  6. Step 6: Final answer
    x = 95,784.64

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.