Home / 85,744.46-128,660.60-40,816.67

Finding the Fourth Proportional to 85,744.46, 128,660.60 and 40,816.67

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Solution

The fourth proportional to 85,744.46, 128,660.60 and 40,816.67 is: 61,245.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,744.46 : 128,660.60 = 40,816.67 : x
  2. Step 2: Convert to fraction form
    85,744.46/128,660.60 = 40,816.67/x
  3. Step 3: Cross multiply
    85,744.46x = 128,660.60 × 40,816.67
  4. Step 4: Simplify right side
    85,744.46x = 5,251,496,710.94
  5. Step 5: Solve for x
    x = 5,251,496,710.94/85,744.46
  6. Step 6: Final answer
    x = 61,245.90

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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.