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Finding the Fourth Proportional to 220,487.72, 330,624.59 and 129,328.02

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Solution

The fourth proportional to 220,487.72, 330,624.59 and 129,328.02 is: 193,929.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,487.72 : 330,624.59 = 129,328.02 : x
  2. Step 2: Convert to fraction form
    220,487.72/330,624.59 = 129,328.02/x
  3. Step 3: Cross multiply
    220,487.72x = 330,624.59 × 129,328.02
  4. Step 4: Simplify right side
    220,487.72x = 42,759,022,941.37
  5. Step 5: Solve for x
    x = 42,759,022,941.37/220,487.72
  6. Step 6: Final answer
    x = 193,929.28

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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.