Home / 91,072.42-135,896.28-81,616.06

Finding the Fourth Proportional to 91,072.42, 135,896.28 and 81,616.06

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Solution

The fourth proportional to 91,072.42, 135,896.28 and 81,616.06 is: 121,785.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,072.42 : 135,896.28 = 81,616.06 : x
  2. Step 2: Convert to fraction form
    91,072.42/135,896.28 = 81,616.06/x
  3. Step 3: Cross multiply
    91,072.42x = 135,896.28 × 81,616.06
  4. Step 4: Simplify right side
    91,072.42x = 11,091,318,942.26
  5. Step 5: Solve for x
    x = 11,091,318,942.26/91,072.42
  6. Step 6: Final answer
    x = 121,785.71

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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.