Home / 89,939.08-135,061.71-86,177.44

Finding the Fourth Proportional to 89,939.08, 135,061.71 and 86,177.44

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Solution

The fourth proportional to 89,939.08, 135,061.71 and 86,177.44 is: 129,412.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,939.08 : 135,061.71 = 86,177.44 : x
  2. Step 2: Convert to fraction form
    89,939.08/135,061.71 = 86,177.44/x
  3. Step 3: Cross multiply
    89,939.08x = 135,061.71 × 86,177.44
  4. Step 4: Simplify right side
    89,939.08x = 11,639,272,409.82
  5. Step 5: Solve for x
    x = 11,639,272,409.82/89,939.08
  6. Step 6: Final answer
    x = 129,412.85

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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.