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Finding the Fourth Proportional to 219,181.61, 328,770.16 and 69,421.86

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Solution

The fourth proportional to 219,181.61, 328,770.16 and 69,421.86 is: 104,132.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,181.61 : 328,770.16 = 69,421.86 : x
  2. Step 2: Convert to fraction form
    219,181.61/328,770.16 = 69,421.86/x
  3. Step 3: Cross multiply
    219,181.61x = 328,770.16 × 69,421.86
  4. Step 4: Simplify right side
    219,181.61x = 22,823,835,846.14
  5. Step 5: Solve for x
    x = 22,823,835,846.14/219,181.61
  6. Step 6: Final answer
    x = 104,132.07

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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.