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Finding the Fourth Proportional to 216,508.70, 324,965.55 and 109,968.86

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Solution

The fourth proportional to 216,508.70, 324,965.55 and 109,968.86 is: 165,056.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,508.70 : 324,965.55 = 109,968.86 : x
  2. Step 2: Convert to fraction form
    216,508.70/324,965.55 = 109,968.86/x
  3. Step 3: Cross multiply
    216,508.70x = 324,965.55 × 109,968.86
  4. Step 4: Simplify right side
    216,508.70x = 35,736,091,072.77
  5. Step 5: Solve for x
    x = 35,736,091,072.77/216,508.70
  6. Step 6: Final answer
    x = 165,056.14

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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.