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Finding the Fourth Proportional to 220,309.80, 330,236.88 and 87,006.66

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Solution

The fourth proportional to 220,309.80, 330,236.88 and 87,006.66 is: 130,420.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,309.80 : 330,236.88 = 87,006.66 : x
  2. Step 2: Convert to fraction form
    220,309.80/330,236.88 = 87,006.66/x
  3. Step 3: Cross multiply
    220,309.80x = 330,236.88 × 87,006.66
  4. Step 4: Simplify right side
    220,309.80x = 28,732,807,937.62
  5. Step 5: Solve for x
    x = 28,732,807,937.62/220,309.80
  6. Step 6: Final answer
    x = 130,420.02

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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.