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Finding the Fourth Proportional to 216,960.71, 324,121.63 and 140,435.82

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Solution

The fourth proportional to 216,960.71, 324,121.63 and 140,435.82 is: 209,799.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,960.71 : 324,121.63 = 140,435.82 : x
  2. Step 2: Convert to fraction form
    216,960.71/324,121.63 = 140,435.82/x
  3. Step 3: Cross multiply
    216,960.71x = 324,121.63 × 140,435.82
  4. Step 4: Simplify right side
    216,960.71x = 45,518,286,888.79
  5. Step 5: Solve for x
    x = 45,518,286,888.79/216,960.71
  6. Step 6: Final answer
    x = 209,799.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.