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Finding the Fourth Proportional to 108,716.80, 162,880.80 and 91,998.40

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Solution

The fourth proportional to 108,716.80, 162,880.80 and 91,998.40 is: 137,833.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,716.80 : 162,880.80 = 91,998.40 : x
  2. Step 2: Convert to fraction form
    108,716.80/162,880.80 = 91,998.40/x
  3. Step 3: Cross multiply
    108,716.80x = 162,880.80 × 91,998.40
  4. Step 4: Simplify right side
    108,716.80x = 14,984,772,990.72
  5. Step 5: Solve for x
    x = 14,984,772,990.72/108,716.80
  6. Step 6: Final answer
    x = 137,833.09

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1.5x scale

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.