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Finding the Fourth Proportional to 81,305.53, 121,958.30 and 53,597.05

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Solution

The fourth proportional to 81,305.53, 121,958.30 and 53,597.05 is: 80,395.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,305.53 : 121,958.30 = 53,597.05 : x
  2. Step 2: Convert to fraction form
    81,305.53/121,958.30 = 53,597.05/x
  3. Step 3: Cross multiply
    81,305.53x = 121,958.30 × 53,597.05
  4. Step 4: Simplify right side
    81,305.53x = 6,536,605,103.02
  5. Step 5: Solve for x
    x = 6,536,605,103.02/81,305.53
  6. Step 6: Final answer
    x = 80,395.58

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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.