Home / 91,327.78-136,991.91-28,145.87

Finding the Fourth Proportional to 91,327.78, 136,991.91 and 28,145.87

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Solution

The fourth proportional to 91,327.78, 136,991.91 and 28,145.87 is: 42,218.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,327.78 : 136,991.91 = 28,145.87 : x
  2. Step 2: Convert to fraction form
    91,327.78/136,991.91 = 28,145.87/x
  3. Step 3: Cross multiply
    91,327.78x = 136,991.91 × 28,145.87
  4. Step 4: Simplify right side
    91,327.78x = 3,855,755,804.95
  5. Step 5: Solve for x
    x = 3,855,755,804.95/91,327.78
  6. Step 6: Final answer
    x = 42,218.87

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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.