Home / 81,037.72-121,494.61-66,953.44

Finding the Fourth Proportional to 81,037.72, 121,494.61 and 66,953.44

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Solution

The fourth proportional to 81,037.72, 121,494.61 and 66,953.44 is: 100,378.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,037.72 : 121,494.61 = 66,953.44 : x
  2. Step 2: Convert to fraction form
    81,037.72/121,494.61 = 66,953.44/x
  3. Step 3: Cross multiply
    81,037.72x = 121,494.61 × 66,953.44
  4. Step 4: Simplify right side
    81,037.72x = 8,134,482,080.96
  5. Step 5: Solve for x
    x = 8,134,482,080.96/81,037.72
  6. Step 6: Final answer
    x = 100,378.96

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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.