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Finding the Fourth Proportional to 220,506.79, 330,869.54 and 87,384.10

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Solution

The fourth proportional to 220,506.79, 330,869.54 and 87,384.10 is: 131,119.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,506.79 : 330,869.54 = 87,384.10 : x
  2. Step 2: Convert to fraction form
    220,506.79/330,869.54 = 87,384.10/x
  3. Step 3: Cross multiply
    220,506.79x = 330,869.54 × 87,384.10
  4. Step 4: Simplify right side
    220,506.79x = 28,912,735,706.22
  5. Step 5: Solve for x
    x = 28,912,735,706.22/220,506.79
  6. Step 6: Final answer
    x = 131,119.48

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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.