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Finding the Fourth Proportional to 216,659.75, 298,989.43 and 121,166.82

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Solution

The fourth proportional to 216,659.75, 298,989.43 and 121,166.82 is: 167,209.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,659.75 : 298,989.43 = 121,166.82 : x
  2. Step 2: Convert to fraction form
    216,659.75/298,989.43 = 121,166.82/x
  3. Step 3: Cross multiply
    216,659.75x = 298,989.43 × 121,166.82
  4. Step 4: Simplify right side
    216,659.75x = 36,227,598,143.80
  5. Step 5: Solve for x
    x = 36,227,598,143.80/216,659.75
  6. Step 6: Final answer
    x = 167,209.64

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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.