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Finding the Fourth Proportional to 92,660.58, 138,969.54 and 55,231.20

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Solution

The fourth proportional to 92,660.58, 138,969.54 and 55,231.20 is: 82,834.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,660.58 : 138,969.54 = 55,231.20 : x
  2. Step 2: Convert to fraction form
    92,660.58/138,969.54 = 55,231.20/x
  3. Step 3: Cross multiply
    92,660.58x = 138,969.54 × 55,231.20
  4. Step 4: Simplify right side
    92,660.58x = 7,675,454,457.65
  5. Step 5: Solve for x
    x = 7,675,454,457.65/92,660.58
  6. Step 6: Final answer
    x = 82,834.09

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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.