Home / 81,510.24-122,274.66-73,138.92

Finding the Fourth Proportional to 81,510.24, 122,274.66 and 73,138.92

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Solution

The fourth proportional to 81,510.24, 122,274.66 and 73,138.92 is: 109,716.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,510.24 : 122,274.66 = 73,138.92 : x
  2. Step 2: Convert to fraction form
    81,510.24/122,274.66 = 73,138.92/x
  3. Step 3: Cross multiply
    81,510.24x = 122,274.66 × 73,138.92
  4. Step 4: Simplify right side
    81,510.24x = 8,943,036,575.77
  5. Step 5: Solve for x
    x = 8,943,036,575.77/81,510.24
  6. Step 6: Final answer
    x = 109,716.72

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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.