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Finding the Fourth Proportional to 219,715.70, 329,682.90 and 86,600.30

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Solution

The fourth proportional to 219,715.70, 329,682.90 and 86,600.30 is: 129,943.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,715.70 : 329,682.90 = 86,600.30 : x
  2. Step 2: Convert to fraction form
    219,715.70/329,682.90 = 86,600.30/x
  3. Step 3: Cross multiply
    219,715.70x = 329,682.90 × 86,600.30
  4. Step 4: Simplify right side
    219,715.70x = 28,550,638,044.87
  5. Step 5: Solve for x
    x = 28,550,638,044.87/219,715.70
  6. Step 6: Final answer
    x = 129,943.55

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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.