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Finding the Fourth Proportional to 206,479.80, 284,936.40 and 121,602.60

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Solution

The fourth proportional to 206,479.80, 284,936.40 and 121,602.60 is: 167,808.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,479.80 : 284,936.40 = 121,602.60 : x
  2. Step 2: Convert to fraction form
    206,479.80/284,936.40 = 121,602.60/x
  3. Step 3: Cross multiply
    206,479.80x = 284,936.40 × 121,602.60
  4. Step 4: Simplify right side
    206,479.80x = 34,649,007,074.64
  5. Step 5: Solve for x
    x = 34,649,007,074.64/206,479.80
  6. Step 6: Final answer
    x = 167,808.22

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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.