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Finding the Fourth Proportional to 216,543.24, 324,870.89 and 66,780.21

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Solution

The fourth proportional to 216,543.24, 324,870.89 and 66,780.21 is: 100,187.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,543.24 : 324,870.89 = 66,780.21 : x
  2. Step 2: Convert to fraction form
    216,543.24/324,870.89 = 66,780.21/x
  3. Step 3: Cross multiply
    216,543.24x = 324,870.89 × 66,780.21
  4. Step 4: Simplify right side
    216,543.24x = 21,694,946,257.09
  5. Step 5: Solve for x
    x = 21,694,946,257.09/216,543.24
  6. Step 6: Final answer
    x = 100,187.59

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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.