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Finding the Fourth Proportional to 220,820.16, 330,983.88 and 87,664.80

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Solution

The fourth proportional to 220,820.16, 330,983.88 and 87,664.80 is: 131,399.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,820.16 : 330,983.88 = 87,664.80 : x
  2. Step 2: Convert to fraction form
    220,820.16/330,983.88 = 87,664.80/x
  3. Step 3: Cross multiply
    220,820.16x = 330,983.88 × 87,664.80
  4. Step 4: Simplify right side
    220,820.16x = 29,015,635,643.42
  5. Step 5: Solve for x
    x = 29,015,635,643.42/220,820.16
  6. Step 6: Final answer
    x = 131,399.40

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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.