Home / 81,139.92-121,721.40-24,984.69

Finding the Fourth Proportional to 81,139.92, 121,721.40 and 24,984.69

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Solution

The fourth proportional to 81,139.92, 121,721.40 and 24,984.69 is: 37,480.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,139.92 : 121,721.40 = 24,984.69 : x
  2. Step 2: Convert to fraction form
    81,139.92/121,721.40 = 24,984.69/x
  3. Step 3: Cross multiply
    81,139.92x = 121,721.40 × 24,984.69
  4. Step 4: Simplify right side
    81,139.92x = 3,041,171,445.37
  5. Step 5: Solve for x
    x = 3,041,171,445.37/81,139.92
  6. Step 6: Final answer
    x = 37,480.58

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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.