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Finding the Fourth Proportional to 89,879.52, 124,011.60 and 54,945.30

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Solution

The fourth proportional to 89,879.52, 124,011.60 and 54,945.30 is: 75,810.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,879.52 : 124,011.60 = 54,945.30 : x
  2. Step 2: Convert to fraction form
    89,879.52/124,011.60 = 54,945.30/x
  3. Step 3: Cross multiply
    89,879.52x = 124,011.60 × 54,945.30
  4. Step 4: Simplify right side
    89,879.52x = 6,813,854,565.48
  5. Step 5: Solve for x
    x = 6,813,854,565.48/89,879.52
  6. Step 6: Final answer
    x = 75,810.98

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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.