Home / 81,160.20-121,740.30-53,166.60

Finding the Fourth Proportional to 81,160.20, 121,740.30 and 53,166.60

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Solution

The fourth proportional to 81,160.20, 121,740.30 and 53,166.60 is: 79,749.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,160.20 : 121,740.30 = 53,166.60 : x
  2. Step 2: Convert to fraction form
    81,160.20/121,740.30 = 53,166.60/x
  3. Step 3: Cross multiply
    81,160.20x = 121,740.30 × 53,166.60
  4. Step 4: Simplify right side
    81,160.20x = 6,472,517,833.98
  5. Step 5: Solve for x
    x = 6,472,517,833.98/81,160.20
  6. Step 6: Final answer
    x = 79,749.90

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1.5x scale

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.