Home / 81,213.20-121,819.80-39,741.20

Finding the Fourth Proportional to 81,213.20, 121,819.80 and 39,741.20

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Solution

The fourth proportional to 81,213.20, 121,819.80 and 39,741.20 is: 59,611.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,213.20 : 121,819.80 = 39,741.20 : x
  2. Step 2: Convert to fraction form
    81,213.20/121,819.80 = 39,741.20/x
  3. Step 3: Cross multiply
    81,213.20x = 121,819.80 × 39,741.20
  4. Step 4: Simplify right side
    81,213.20x = 4,841,265,035.76
  5. Step 5: Solve for x
    x = 4,841,265,035.76/81,213.20
  6. Step 6: Final answer
    x = 59,611.80

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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.