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Finding the Fourth Proportional to 207,991.76, 287,029.44 and 112,499.12

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Solution

The fourth proportional to 207,991.76, 287,029.44 and 112,499.12 is: 155,249.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,991.76 : 287,029.44 = 112,499.12 : x
  2. Step 2: Convert to fraction form
    207,991.76/287,029.44 = 112,499.12/x
  3. Step 3: Cross multiply
    207,991.76x = 287,029.44 × 112,499.12
  4. Step 4: Simplify right side
    207,991.76x = 32,290,559,414.09
  5. Step 5: Solve for x
    x = 32,290,559,414.09/207,991.76
  6. Step 6: Final answer
    x = 155,249.22

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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.