Home / 81,984.30-122,976.45-67,404.30

Finding the Fourth Proportional to 81,984.30, 122,976.45 and 67,404.30

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Solution

The fourth proportional to 81,984.30, 122,976.45 and 67,404.30 is: 101,106.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,984.30 : 122,976.45 = 67,404.30 : x
  2. Step 2: Convert to fraction form
    81,984.30/122,976.45 = 67,404.30/x
  3. Step 3: Cross multiply
    81,984.30x = 122,976.45 × 67,404.30
  4. Step 4: Simplify right side
    81,984.30x = 8,289,141,528.74
  5. Step 5: Solve for x
    x = 8,289,141,528.74/81,984.30
  6. Step 6: Final answer
    x = 101,106.45

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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.