Home / 90,918.43-136,399.10-28,588.93

Finding the Fourth Proportional to 90,918.43, 136,399.10 and 28,588.93

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Solution

The fourth proportional to 90,918.43, 136,399.10 and 28,588.93 is: 42,890.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,918.43 : 136,399.10 = 28,588.93 : x
  2. Step 2: Convert to fraction form
    90,918.43/136,399.10 = 28,588.93/x
  3. Step 3: Cross multiply
    90,918.43x = 136,399.10 × 28,588.93
  4. Step 4: Simplify right side
    90,918.43x = 3,899,504,321.96
  5. Step 5: Solve for x
    x = 3,899,504,321.96/90,918.43
  6. Step 6: Final answer
    x = 42,890.14

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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.