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Finding the Fourth Proportional to 219,109.86, 328,631.78 and 69,330.67

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Solution

The fourth proportional to 219,109.86, 328,631.78 and 69,330.67 is: 103,985.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,109.86 : 328,631.78 = 69,330.67 : x
  2. Step 2: Convert to fraction form
    219,109.86/328,631.78 = 69,330.67/x
  3. Step 3: Cross multiply
    219,109.86x = 328,631.78 × 69,330.67
  4. Step 4: Simplify right side
    219,109.86x = 22,784,260,842.44
  5. Step 5: Solve for x
    x = 22,784,260,842.44/219,109.86
  6. Step 6: Final answer
    x = 103,985.56

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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.