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Finding the Fourth Proportional to 191,708.12, 287,690.16 and 67,049.12

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Solution

The fourth proportional to 191,708.12, 287,690.16 and 67,049.12 is: 100,618.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,708.12 : 287,690.16 = 67,049.12 : x
  2. Step 2: Convert to fraction form
    191,708.12/287,690.16 = 67,049.12/x
  3. Step 3: Cross multiply
    191,708.12x = 287,690.16 × 67,049.12
  4. Step 4: Simplify right side
    191,708.12x = 19,289,372,060.66
  5. Step 5: Solve for x
    x = 19,289,372,060.66/191,708.12
  6. Step 6: Final answer
    x = 100,618.44

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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.