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Finding the Fourth Proportional to 219,079.55, 328,659.92 and 69,357.53

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Solution

The fourth proportional to 219,079.55, 328,659.92 and 69,357.53 is: 104,049.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,079.55 : 328,659.92 = 69,357.53 : x
  2. Step 2: Convert to fraction form
    219,079.55/328,659.92 = 69,357.53/x
  3. Step 3: Cross multiply
    219,079.55x = 328,659.92 × 69,357.53
  4. Step 4: Simplify right side
    219,079.55x = 22,795,040,261.20
  5. Step 5: Solve for x
    x = 22,795,040,261.20/219,079.55
  6. Step 6: Final answer
    x = 104,049.15

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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.