Home / 81,161.20-121,741.80-53,167.60

Finding the Fourth Proportional to 81,161.20, 121,741.80 and 53,167.60

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Solution

The fourth proportional to 81,161.20, 121,741.80 and 53,167.60 is: 79,751.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,161.20 : 121,741.80 = 53,167.60 : x
  2. Step 2: Convert to fraction form
    81,161.20/121,741.80 = 53,167.60/x
  3. Step 3: Cross multiply
    81,161.20x = 121,741.80 × 53,167.60
  4. Step 4: Simplify right side
    81,161.20x = 6,472,719,325.68
  5. Step 5: Solve for x
    x = 6,472,719,325.68/81,161.20
  6. Step 6: Final answer
    x = 79,751.40

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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.