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Finding the Fourth Proportional to 218,587.20, 328,026.60 and 100,197.60

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Solution

The fourth proportional to 218,587.20, 328,026.60 and 100,197.60 is: 150,363.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,587.20 : 328,026.60 = 100,197.60 : x
  2. Step 2: Convert to fraction form
    218,587.20/328,026.60 = 100,197.60/x
  3. Step 3: Cross multiply
    218,587.20x = 328,026.60 × 100,197.60
  4. Step 4: Simplify right side
    218,587.20x = 32,867,478,056.16
  5. Step 5: Solve for x
    x = 32,867,478,056.16/218,587.20
  6. Step 6: Final answer
    x = 150,363.23

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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.