Home / 81,777.20-122,665.80-25,617.78

Finding the Fourth Proportional to 81,777.20, 122,665.80 and 25,617.78

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Solution

The fourth proportional to 81,777.20, 122,665.80 and 25,617.78 is: 38,426.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,777.20 : 122,665.80 = 25,617.78 : x
  2. Step 2: Convert to fraction form
    81,777.20/122,665.80 = 25,617.78/x
  3. Step 3: Cross multiply
    81,777.20x = 122,665.80 × 25,617.78
  4. Step 4: Simplify right side
    81,777.20x = 3,142,425,477.92
  5. Step 5: Solve for x
    x = 3,142,425,477.92/81,777.20
  6. Step 6: Final answer
    x = 38,426.67

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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.