Home / 81,306.60-121,996.11-51,716.76

Finding the Fourth Proportional to 81,306.60, 121,996.11 and 51,716.76

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Solution

The fourth proportional to 81,306.60, 121,996.11 and 51,716.76 is: 77,598.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,306.60 : 121,996.11 = 51,716.76 : x
  2. Step 2: Convert to fraction form
    81,306.60/121,996.11 = 51,716.76/x
  3. Step 3: Cross multiply
    81,306.60x = 121,996.11 × 51,716.76
  4. Step 4: Simplify right side
    81,306.60x = 6,309,243,541.80
  5. Step 5: Solve for x
    x = 6,309,243,541.80/81,306.60
  6. Step 6: Final answer
    x = 77,598.17

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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.