Home / 81,199.16-121,628.64-51,601.76

Finding the Fourth Proportional to 81,199.16, 121,628.64 and 51,601.76

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Solution

The fourth proportional to 81,199.16, 121,628.64 and 51,601.76 is: 77,294.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,199.16 : 121,628.64 = 51,601.76 : x
  2. Step 2: Convert to fraction form
    81,199.16/121,628.64 = 51,601.76/x
  3. Step 3: Cross multiply
    81,199.16x = 121,628.64 × 51,601.76
  4. Step 4: Simplify right side
    81,199.16x = 6,276,251,890.41
  5. Step 5: Solve for x
    x = 6,276,251,890.41/81,199.16
  6. Step 6: Final answer
    x = 77,294.54

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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.