Home / 85,614.90-128,568.15-56,163.30

Finding the Fourth Proportional to 85,614.90, 128,568.15 and 56,163.30

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Solution

The fourth proportional to 85,614.90, 128,568.15 and 56,163.30 is: 84,340.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,614.90 : 128,568.15 = 56,163.30 : x
  2. Step 2: Convert to fraction form
    85,614.90/128,568.15 = 56,163.30/x
  3. Step 3: Cross multiply
    85,614.90x = 128,568.15 × 56,163.30
  4. Step 4: Simplify right side
    85,614.90x = 7,220,811,578.90
  5. Step 5: Solve for x
    x = 7,220,811,578.90/85,614.90
  6. Step 6: Final answer
    x = 84,340.59

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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.