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Finding the Fourth Proportional to 90,673.85, 125,190.93 and 81,083.86

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Solution

The fourth proportional to 90,673.85, 125,190.93 and 81,083.86 is: 111,950.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,673.85 : 125,190.93 = 81,083.86 : x
  2. Step 2: Convert to fraction form
    90,673.85/125,190.93 = 81,083.86/x
  3. Step 3: Cross multiply
    90,673.85x = 125,190.93 × 81,083.86
  4. Step 4: Simplify right side
    90,673.85x = 10,150,963,832.48
  5. Step 5: Solve for x
    x = 10,150,963,832.48/90,673.85
  6. Step 6: Final answer
    x = 111,950.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.