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Finding the Fourth Proportional to 208,115.15, 287,198.90 and 112,621.84

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Solution

The fourth proportional to 208,115.15, 287,198.90 and 112,621.84 is: 155,418.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,115.15 : 287,198.90 = 112,621.84 : x
  2. Step 2: Convert to fraction form
    208,115.15/287,198.90 = 112,621.84/x
  3. Step 3: Cross multiply
    208,115.15x = 287,198.90 × 112,621.84
  4. Step 4: Simplify right side
    208,115.15x = 32,344,868,000.87
  5. Step 5: Solve for x
    x = 32,344,868,000.87/208,115.15
  6. Step 6: Final answer
    x = 155,418.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.