Home / 81,212.40-121,818.60-28,627.20

Finding the Fourth Proportional to 81,212.40, 121,818.60 and 28,627.20

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Solution

The fourth proportional to 81,212.40, 121,818.60 and 28,627.20 is: 42,940.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,212.40 : 121,818.60 = 28,627.20 : x
  2. Step 2: Convert to fraction form
    81,212.40/121,818.60 = 28,627.20/x
  3. Step 3: Cross multiply
    81,212.40x = 121,818.60 × 28,627.20
  4. Step 4: Simplify right side
    81,212.40x = 3,487,325,425.92
  5. Step 5: Solve for x
    x = 3,487,325,425.92/81,212.40
  6. Step 6: Final answer
    x = 42,940.80

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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.