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Finding the Fourth Proportional to 220,106.70, 330,269.40 and 86,991.30

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Solution

The fourth proportional to 220,106.70, 330,269.40 and 86,991.30 is: 130,530.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,106.70 : 330,269.40 = 86,991.30 : x
  2. Step 2: Convert to fraction form
    220,106.70/330,269.40 = 86,991.30/x
  3. Step 3: Cross multiply
    220,106.70x = 330,269.40 × 86,991.30
  4. Step 4: Simplify right side
    220,106.70x = 28,730,564,456.22
  5. Step 5: Solve for x
    x = 28,730,564,456.22/220,106.70
  6. Step 6: Final answer
    x = 130,530.17

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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.