Home / 81,076.38-121,621.05-28,497.66

Finding the Fourth Proportional to 81,076.38, 121,621.05 and 28,497.66

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Solution

The fourth proportional to 81,076.38, 121,621.05 and 28,497.66 is: 42,748.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,076.38 : 121,621.05 = 28,497.66 : x
  2. Step 2: Convert to fraction form
    81,076.38/121,621.05 = 28,497.66/x
  3. Step 3: Cross multiply
    81,076.38x = 121,621.05 × 28,497.66
  4. Step 4: Simplify right side
    81,076.38x = 3,465,915,331.74
  5. Step 5: Solve for x
    x = 3,465,915,331.74/81,076.38
  6. Step 6: Final answer
    x = 42,748.77

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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.