Home / 100,760.12-139,046.02-55,438.09

Finding the Fourth Proportional to 100,760.12, 139,046.02 and 55,438.09

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Solution

The fourth proportional to 100,760.12, 139,046.02 and 55,438.09 is: 76,502.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,760.12 : 139,046.02 = 55,438.09 : x
  2. Step 2: Convert to fraction form
    100,760.12/139,046.02 = 55,438.09/x
  3. Step 3: Cross multiply
    100,760.12x = 139,046.02 × 55,438.09
  4. Step 4: Simplify right side
    100,760.12x = 7,708,445,284.69
  5. Step 5: Solve for x
    x = 7,708,445,284.69/100,760.12
  6. Step 6: Final answer
    x = 76,502.94

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.