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Finding the Fourth Proportional to 208,098.40, 312,147.60 and 89,687.20

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Solution

The fourth proportional to 208,098.40, 312,147.60 and 89,687.20 is: 134,530.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,098.40 : 312,147.60 = 89,687.20 : x
  2. Step 2: Convert to fraction form
    208,098.40/312,147.60 = 89,687.20/x
  3. Step 3: Cross multiply
    208,098.40x = 312,147.60 × 89,687.20
  4. Step 4: Simplify right side
    208,098.40x = 27,995,644,230.72
  5. Step 5: Solve for x
    x = 27,995,644,230.72/208,098.40
  6. Step 6: Final answer
    x = 134,530.80

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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.