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Finding the Fourth Proportional to 219,692.08, 329,316.54 and 86,520.88

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Solution

The fourth proportional to 219,692.08, 329,316.54 and 86,520.88 is: 129,694.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,692.08 : 329,316.54 = 86,520.88 : x
  2. Step 2: Convert to fraction form
    219,692.08/329,316.54 = 86,520.88/x
  3. Step 3: Cross multiply
    219,692.08x = 329,316.54 × 86,520.88
  4. Step 4: Simplify right side
    219,692.08x = 28,492,756,839.36
  5. Step 5: Solve for x
    x = 28,492,756,839.36/219,692.08
  6. Step 6: Final answer
    x = 129,694.06

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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.