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Finding the Fourth Proportional to 206,859.60, 285,503.40 and 121,971.60

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Solution

The fourth proportional to 206,859.60, 285,503.40 and 121,971.60 is: 168,342.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,859.60 : 285,503.40 = 121,971.60 : x
  2. Step 2: Convert to fraction form
    206,859.60/285,503.40 = 121,971.60/x
  3. Step 3: Cross multiply
    206,859.60x = 285,503.40 × 121,971.60
  4. Step 4: Simplify right side
    206,859.60x = 34,823,306,503.44
  5. Step 5: Solve for x
    x = 34,823,306,503.44/206,859.60
  6. Step 6: Final answer
    x = 168,342.71

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1.5x scale

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.