Home / 81,026.40-121,611.60-47,704.80

Finding the Fourth Proportional to 81,026.40, 121,611.60 and 47,704.80

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Solution

The fourth proportional to 81,026.40, 121,611.60 and 47,704.80 is: 71,599.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,026.40 : 121,611.60 = 47,704.80 : x
  2. Step 2: Convert to fraction form
    81,026.40/121,611.60 = 47,704.80/x
  3. Step 3: Cross multiply
    81,026.40x = 121,611.60 × 47,704.80
  4. Step 4: Simplify right side
    81,026.40x = 5,801,457,055.68
  5. Step 5: Solve for x
    x = 5,801,457,055.68/81,026.40
  6. Step 6: Final answer
    x = 71,599.59

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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.