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Finding the Fourth Proportional to 220,398.35, 330,403.73 and 87,372.05

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Solution

The fourth proportional to 220,398.35, 330,403.73 and 87,372.05 is: 130,981.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,398.35 : 330,403.73 = 87,372.05 : x
  2. Step 2: Convert to fraction form
    220,398.35/330,403.73 = 87,372.05/x
  3. Step 3: Cross multiply
    220,398.35x = 330,403.73 × 87,372.05
  4. Step 4: Simplify right side
    220,398.35x = 28,868,049,128.87
  5. Step 5: Solve for x
    x = 28,868,049,128.87/220,398.35
  6. Step 6: Final answer
    x = 130,981.24

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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.