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Finding the Fourth Proportional to 219,266.20, 328,899.30 and 86,102.20

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Solution

The fourth proportional to 219,266.20, 328,899.30 and 86,102.20 is: 129,153.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,266.20 : 328,899.30 = 86,102.20 : x
  2. Step 2: Convert to fraction form
    219,266.20/328,899.30 = 86,102.20/x
  3. Step 3: Cross multiply
    219,266.20x = 328,899.30 × 86,102.20
  4. Step 4: Simplify right side
    219,266.20x = 28,318,953,308.46
  5. Step 5: Solve for x
    x = 28,318,953,308.46/219,266.20
  6. Step 6: Final answer
    x = 129,153.30

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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.