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Finding the Fourth Proportional to 218,620.22, 328,117.25 and 85,593.90

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Solution

The fourth proportional to 218,620.22, 328,117.25 and 85,593.90 is: 128,464.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,620.22 : 328,117.25 = 85,593.90 : x
  2. Step 2: Convert to fraction form
    218,620.22/328,117.25 = 85,593.90/x
  3. Step 3: Cross multiply
    218,620.22x = 328,117.25 × 85,593.90
  4. Step 4: Simplify right side
    218,620.22x = 28,084,833,444.19
  5. Step 5: Solve for x
    x = 28,084,833,444.19/218,620.22
  6. Step 6: Final answer
    x = 128,464.03

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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.