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Finding the Fourth Proportional to 89,879.62, 124,011.78 and 54,945.46

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Solution

The fourth proportional to 89,879.62, 124,011.78 and 54,945.46 is: 75,811.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,879.62 : 124,011.78 = 54,945.46 : x
  2. Step 2: Convert to fraction form
    89,879.62/124,011.78 = 54,945.46/x
  3. Step 3: Cross multiply
    89,879.62x = 124,011.78 × 54,945.46
  4. Step 4: Simplify right side
    89,879.62x = 6,813,884,297.52
  5. Step 5: Solve for x
    x = 6,813,884,297.52/89,879.62
  6. Step 6: Final answer
    x = 75,811.23

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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.