Home / 81,201.60-121,811.04-25,784.64

Finding the Fourth Proportional to 81,201.60, 121,811.04 and 25,784.64

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Solution

The fourth proportional to 81,201.60, 121,811.04 and 25,784.64 is: 38,679.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,201.60 : 121,811.04 = 25,784.64 : x
  2. Step 2: Convert to fraction form
    81,201.60/121,811.04 = 25,784.64/x
  3. Step 3: Cross multiply
    81,201.60x = 121,811.04 × 25,784.64
  4. Step 4: Simplify right side
    81,201.60x = 3,140,853,814.43
  5. Step 5: Solve for x
    x = 3,140,853,814.43/81,201.60
  6. Step 6: Final answer
    x = 38,679.70

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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.