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Finding the Fourth Proportional to 168,813.90, 253,184.40 and 74,043.90

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Solution

The fourth proportional to 168,813.90, 253,184.40 and 74,043.90 is: 111,049.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    168,813.90 : 253,184.40 = 74,043.90 : x
  2. Step 2: Convert to fraction form
    168,813.90/253,184.40 = 74,043.90/x
  3. Step 3: Cross multiply
    168,813.90x = 253,184.40 × 74,043.90
  4. Step 4: Simplify right side
    168,813.90x = 18,746,760,395.16
  5. Step 5: Solve for x
    x = 18,746,760,395.16/168,813.90
  6. Step 6: Final answer
    x = 111,049.86

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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.