Home / 81,039.84-121,596.12-51,449.76

Finding the Fourth Proportional to 81,039.84, 121,596.12 and 51,449.76

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Solution

The fourth proportional to 81,039.84, 121,596.12 and 51,449.76 is: 77,197.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,039.84 : 121,596.12 = 51,449.76 : x
  2. Step 2: Convert to fraction form
    81,039.84/121,596.12 = 51,449.76/x
  3. Step 3: Cross multiply
    81,039.84x = 121,596.12 × 51,449.76
  4. Step 4: Simplify right side
    81,039.84x = 6,256,091,190.93
  5. Step 5: Solve for x
    x = 6,256,091,190.93/81,039.84
  6. Step 6: Final answer
    x = 77,197.72

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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.