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Finding the Fourth Proportional to 80,330.49, 120,501.63 and 21,165.75

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Solution

The fourth proportional to 80,330.49, 120,501.63 and 21,165.75 is: 31,750.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,330.49 : 120,501.63 = 21,165.75 : x
  2. Step 2: Convert to fraction form
    80,330.49/120,501.63 = 21,165.75/x
  3. Step 3: Cross multiply
    80,330.49x = 120,501.63 × 21,165.75
  4. Step 4: Simplify right side
    80,330.49x = 2,550,507,375.17
  5. Step 5: Solve for x
    x = 2,550,507,375.17/80,330.49
  6. Step 6: Final answer
    x = 31,750.18

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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.