Home / 80,968.20-121,430.70-28,372.20

Finding the Fourth Proportional to 80,968.20, 121,430.70 and 28,372.20

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Solution

The fourth proportional to 80,968.20, 121,430.70 and 28,372.20 is: 42,550.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,968.20 : 121,430.70 = 28,372.20 : x
  2. Step 2: Convert to fraction form
    80,968.20/121,430.70 = 28,372.20/x
  3. Step 3: Cross multiply
    80,968.20x = 121,430.70 × 28,372.20
  4. Step 4: Simplify right side
    80,968.20x = 3,445,256,106.54
  5. Step 5: Solve for x
    x = 3,445,256,106.54/80,968.20
  6. Step 6: Final answer
    x = 42,550.73

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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.