Home / 91,083.03-135,719.09-81,145.95

Finding the Fourth Proportional to 91,083.03, 135,719.09 and 81,145.95

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Solution

The fourth proportional to 91,083.03, 135,719.09 and 81,145.95 is: 120,912.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,083.03 : 135,719.09 = 81,145.95 : x
  2. Step 2: Convert to fraction form
    91,083.03/135,719.09 = 81,145.95/x
  3. Step 3: Cross multiply
    91,083.03x = 135,719.09 × 81,145.95
  4. Step 4: Simplify right side
    91,083.03x = 11,013,054,085.46
  5. Step 5: Solve for x
    x = 11,013,054,085.46/91,083.03
  6. Step 6: Final answer
    x = 120,912.25

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.