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Finding the Fourth Proportional to 80,687.16, 120,981.36 and 33,287.58

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Solution

The fourth proportional to 80,687.16, 120,981.36 and 33,287.58 is: 49,911.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,687.16 : 120,981.36 = 33,287.58 : x
  2. Step 2: Convert to fraction form
    80,687.16/120,981.36 = 33,287.58/x
  3. Step 3: Cross multiply
    80,687.16x = 120,981.36 × 33,287.58
  4. Step 4: Simplify right side
    80,687.16x = 4,027,176,699.51
  5. Step 5: Solve for x
    x = 4,027,176,699.51/80,687.16
  6. Step 6: Final answer
    x = 49,911.00

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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.