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Finding the Fourth Proportional to 68,662.25, 102,478.57 and 64,178.21

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Solution

The fourth proportional to 68,662.25, 102,478.57 and 64,178.21 is: 95,786.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,662.25 : 102,478.57 = 64,178.21 : x
  2. Step 2: Convert to fraction form
    68,662.25/102,478.57 = 64,178.21/x
  3. Step 3: Cross multiply
    68,662.25x = 102,478.57 × 64,178.21
  4. Step 4: Simplify right side
    68,662.25x = 6,576,891,185.96
  5. Step 5: Solve for x
    x = 6,576,891,185.96/68,662.25
  6. Step 6: Final answer
    x = 95,786.13

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1.5x scale

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.