Home / 81,119.76-121,666.32-28,516.92

Finding the Fourth Proportional to 81,119.76, 121,666.32 and 28,516.92

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Solution

The fourth proportional to 81,119.76, 121,666.32 and 28,516.92 is: 42,770.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,119.76 : 121,666.32 = 28,516.92 : x
  2. Step 2: Convert to fraction form
    81,119.76/121,666.32 = 28,516.92/x
  3. Step 3: Cross multiply
    81,119.76x = 121,666.32 × 28,516.92
  4. Step 4: Simplify right side
    81,119.76x = 3,469,548,714.13
  5. Step 5: Solve for x
    x = 3,469,548,714.13/81,119.76
  6. Step 6: Final answer
    x = 42,770.70

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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.