Home / 100,753.06-139,040.40-57,731.69

Finding the Fourth Proportional to 100,753.06, 139,040.40 and 57,731.69

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Solution

The fourth proportional to 100,753.06, 139,040.40 and 57,731.69 is: 79,670.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,753.06 : 139,040.40 = 57,731.69 : x
  2. Step 2: Convert to fraction form
    100,753.06/139,040.40 = 57,731.69/x
  3. Step 3: Cross multiply
    100,753.06x = 139,040.40 × 57,731.69
  4. Step 4: Simplify right side
    100,753.06x = 8,027,037,972.73
  5. Step 5: Solve for x
    x = 8,027,037,972.73/100,753.06
  6. Step 6: Final answer
    x = 79,670.41

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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.