Home / 90,911.07-136,388.07-28,581.57

Finding the Fourth Proportional to 90,911.07, 136,388.07 and 28,581.57

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Solution

The fourth proportional to 90,911.07, 136,388.07 and 28,581.57 is: 42,879.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,911.07 : 136,388.07 = 28,581.57 : x
  2. Step 2: Convert to fraction form
    90,911.07/136,388.07 = 28,581.57/x
  3. Step 3: Cross multiply
    90,911.07x = 136,388.07 × 28,581.57
  4. Step 4: Simplify right side
    90,911.07x = 3,898,185,169.87
  5. Step 5: Solve for x
    x = 3,898,185,169.87/90,911.07
  6. Step 6: Final answer
    x = 42,879.10

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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.