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Finding the Fourth Proportional to 216,156.50, 324,236.19 and 68,412.50

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Solution

The fourth proportional to 216,156.50, 324,236.19 and 68,412.50 is: 102,619.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,156.50 : 324,236.19 = 68,412.50 : x
  2. Step 2: Convert to fraction form
    216,156.50/324,236.19 = 68,412.50/x
  3. Step 3: Cross multiply
    216,156.50x = 324,236.19 × 68,412.50
  4. Step 4: Simplify right side
    216,156.50x = 22,181,808,348.38
  5. Step 5: Solve for x
    x = 22,181,808,348.38/216,156.50
  6. Step 6: Final answer
    x = 102,619.21

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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.