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Finding the Fourth Proportional to 80,570.82, 120,856.13 and 27,980.76

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Solution

The fourth proportional to 80,570.82, 120,856.13 and 27,980.76 is: 41,971.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,570.82 : 120,856.13 = 27,980.76 : x
  2. Step 2: Convert to fraction form
    80,570.82/120,856.13 = 27,980.76/x
  3. Step 3: Cross multiply
    80,570.82x = 120,856.13 × 27,980.76
  4. Step 4: Simplify right side
    80,570.82x = 3,381,646,368.06
  5. Step 5: Solve for x
    x = 3,381,646,368.06/80,570.82
  6. Step 6: Final answer
    x = 41,971.11

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Similar ratio
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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.