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Finding the Fourth Proportional to 216,199.92, 324,266.61 and 72,108.28

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Solution

The fourth proportional to 216,199.92, 324,266.61 and 72,108.28 is: 108,151.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,199.92 : 324,266.61 = 72,108.28 : x
  2. Step 2: Convert to fraction form
    216,199.92/324,266.61 = 72,108.28/x
  3. Step 3: Cross multiply
    216,199.92x = 324,266.61 × 72,108.28
  4. Step 4: Simplify right side
    216,199.92x = 23,382,307,508.53
  5. Step 5: Solve for x
    x = 23,382,307,508.53/216,199.92
  6. Step 6: Final answer
    x = 108,151.32

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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.