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Finding the Fourth Proportional to 148,879.52, 205,455.36 and 81,811.52

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Solution

The fourth proportional to 148,879.52, 205,455.36 and 81,811.52 is: 112,900.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,879.52 : 205,455.36 = 81,811.52 : x
  2. Step 2: Convert to fraction form
    148,879.52/205,455.36 = 81,811.52/x
  3. Step 3: Cross multiply
    148,879.52x = 205,455.36 × 81,811.52
  4. Step 4: Simplify right side
    148,879.52x = 16,808,615,293.75
  5. Step 5: Solve for x
    x = 16,808,615,293.75/148,879.52
  6. Step 6: Final answer
    x = 112,900.79

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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.