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Finding the Fourth Proportional to 207,991.40, 287,027.19 and 112,497.84

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Solution

The fourth proportional to 207,991.40, 287,027.19 and 112,497.84 is: 155,246.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,991.40 : 287,027.19 = 112,497.84 : x
  2. Step 2: Convert to fraction form
    207,991.40/287,027.19 = 112,497.84/x
  3. Step 3: Cross multiply
    207,991.40x = 287,027.19 × 112,497.84
  4. Step 4: Simplify right side
    207,991.40x = 32,289,938,896.27
  5. Step 5: Solve for x
    x = 32,289,938,896.27/207,991.40
  6. Step 6: Final answer
    x = 155,246.51

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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.