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Finding the Fourth Proportional to 137,808.56, 190,175.92 and 80,486.96

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Solution

The fourth proportional to 137,808.56, 190,175.92 and 80,486.96 is: 111,072.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,808.56 : 190,175.92 = 80,486.96 : x
  2. Step 2: Convert to fraction form
    137,808.56/190,175.92 = 80,486.96/x
  3. Step 3: Cross multiply
    137,808.56x = 190,175.92 × 80,486.96
  4. Step 4: Simplify right side
    137,808.56x = 15,306,681,666.00
  5. Step 5: Solve for x
    x = 15,306,681,666.00/137,808.56
  6. Step 6: Final answer
    x = 111,072.07

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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.