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Finding the Fourth Proportional to 132,468.80, 198,184.80 and 85,812.80

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Solution

The fourth proportional to 132,468.80, 198,184.80 and 85,812.80 is: 128,383.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,468.80 : 198,184.80 = 85,812.80 : x
  2. Step 2: Convert to fraction form
    132,468.80/198,184.80 = 85,812.80/x
  3. Step 3: Cross multiply
    132,468.80x = 198,184.80 × 85,812.80
  4. Step 4: Simplify right side
    132,468.80x = 17,006,792,605.44
  5. Step 5: Solve for x
    x = 17,006,792,605.44/132,468.80
  6. Step 6: Final answer
    x = 128,383.38

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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.