Home / 81,470.05-122,175.10-28,148.37

Finding the Fourth Proportional to 81,470.05, 122,175.10 and 28,148.37

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Solution

The fourth proportional to 81,470.05, 122,175.10 and 28,148.37 is: 42,212.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,470.05 : 122,175.10 = 28,148.37 : x
  2. Step 2: Convert to fraction form
    81,470.05/122,175.10 = 28,148.37/x
  3. Step 3: Cross multiply
    81,470.05x = 122,175.10 × 28,148.37
  4. Step 4: Simplify right side
    81,470.05x = 3,439,029,919.59
  5. Step 5: Solve for x
    x = 3,439,029,919.59/81,470.05
  6. Step 6: Final answer
    x = 42,212.20

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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.