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Finding the Fourth Proportional to 216,659.81, 298,989.51 and 121,166.88

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Solution

The fourth proportional to 216,659.81, 298,989.51 and 121,166.88 is: 167,209.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,659.81 : 298,989.51 = 121,166.88 : x
  2. Step 2: Convert to fraction form
    216,659.81/298,989.51 = 121,166.88/x
  3. Step 3: Cross multiply
    216,659.81x = 298,989.51 × 121,166.88
  4. Step 4: Simplify right side
    216,659.81x = 36,227,627,129.82
  5. Step 5: Solve for x
    x = 36,227,627,129.82/216,659.81
  6. Step 6: Final answer
    x = 167,209.73

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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.