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Finding the Fourth Proportional to 216,636.92, 298,958.96 and 121,143.84

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Solution

The fourth proportional to 216,636.92, 298,958.96 and 121,143.84 is: 167,178.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,636.92 : 298,958.96 = 121,143.84 : x
  2. Step 2: Convert to fraction form
    216,636.92/298,958.96 = 121,143.84/x
  3. Step 3: Cross multiply
    216,636.92x = 298,958.96 × 121,143.84
  4. Step 4: Simplify right side
    216,636.92x = 36,217,036,416.81
  5. Step 5: Solve for x
    x = 36,217,036,416.81/216,636.92
  6. Step 6: Final answer
    x = 167,178.51

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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.