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Finding the Fourth Proportional to 118,155.97, 162,998.96 and 79,928.90

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Solution

The fourth proportional to 118,155.97, 162,998.96 and 79,928.90 is: 110,263.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,155.97 : 162,998.96 = 79,928.90 : x
  2. Step 2: Convert to fraction form
    118,155.97/162,998.96 = 79,928.90/x
  3. Step 3: Cross multiply
    118,155.97x = 162,998.96 × 79,928.90
  4. Step 4: Simplify right side
    118,155.97x = 13,028,327,573.94
  5. Step 5: Solve for x
    x = 13,028,327,573.94/118,155.97
  6. Step 6: Final answer
    x = 110,263.81

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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.