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Finding the Fourth Proportional to 220,649.70, 330,812.55 and 87,464.10

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Solution

The fourth proportional to 220,649.70, 330,812.55 and 87,464.10 is: 131,131.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,649.70 : 330,812.55 = 87,464.10 : x
  2. Step 2: Convert to fraction form
    220,649.70/330,812.55 = 87,464.10/x
  3. Step 3: Cross multiply
    220,649.70x = 330,812.55 × 87,464.10
  4. Step 4: Simplify right side
    220,649.70x = 28,934,221,954.46
  5. Step 5: Solve for x
    x = 28,934,221,954.46/220,649.70
  6. Step 6: Final answer
    x = 131,131.93

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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.