Home / 81,966.80-122,950.20-73,109.45

Finding the Fourth Proportional to 81,966.80, 122,950.20 and 73,109.45

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Solution

The fourth proportional to 81,966.80, 122,950.20 and 73,109.45 is: 109,664.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,966.80 : 122,950.20 = 73,109.45 : x
  2. Step 2: Convert to fraction form
    81,966.80/122,950.20 = 73,109.45/x
  3. Step 3: Cross multiply
    81,966.80x = 122,950.20 × 73,109.45
  4. Step 4: Simplify right side
    81,966.80x = 8,988,821,499.39
  5. Step 5: Solve for x
    x = 8,988,821,499.39/81,966.80
  6. Step 6: Final answer
    x = 109,664.18

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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.