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Finding the Fourth Proportional to 217,340.91, 325,929.47 and 90,989.87

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Solution

The fourth proportional to 217,340.91, 325,929.47 and 90,989.87 is: 136,450.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,340.91 : 325,929.47 = 90,989.87 : x
  2. Step 2: Convert to fraction form
    217,340.91/325,929.47 = 90,989.87/x
  3. Step 3: Cross multiply
    217,340.91x = 325,929.47 × 90,989.87
  4. Step 4: Simplify right side
    217,340.91x = 29,656,278,019.87
  5. Step 5: Solve for x
    x = 29,656,278,019.87/217,340.91
  6. Step 6: Final answer
    x = 136,450.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.