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Finding the Fourth Proportional to 219,188.88, 328,789.80 and 86,102.64

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Solution

The fourth proportional to 219,188.88, 328,789.80 and 86,102.64 is: 129,156.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,188.88 : 328,789.80 = 86,102.64 : x
  2. Step 2: Convert to fraction form
    219,188.88/328,789.80 = 86,102.64/x
  3. Step 3: Cross multiply
    219,188.88x = 328,789.80 × 86,102.64
  4. Step 4: Simplify right side
    219,188.88x = 28,309,669,785.07
  5. Step 5: Solve for x
    x = 28,309,669,785.07/219,188.88
  6. Step 6: Final answer
    x = 129,156.51

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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.