Home / 77,120.70-115,709.85-30,406.14

Finding the Fourth Proportional to 77,120.70, 115,709.85 and 30,406.14

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Solution

The fourth proportional to 77,120.70, 115,709.85 and 30,406.14 is: 45,620.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,120.70 : 115,709.85 = 30,406.14 : x
  2. Step 2: Convert to fraction form
    77,120.70/115,709.85 = 30,406.14/x
  3. Step 3: Cross multiply
    77,120.70x = 115,709.85 × 30,406.14
  4. Step 4: Simplify right side
    77,120.70x = 3,518,289,898.48
  5. Step 5: Solve for x
    x = 3,518,289,898.48/77,120.70
  6. Step 6: Final answer
    x = 45,620.56

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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.