Home / 85,420.68-128,087.99-28,474.41

Finding the Fourth Proportional to 85,420.68, 128,087.99 and 28,474.41

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Solution

The fourth proportional to 85,420.68, 128,087.99 and 28,474.41 is: 42,697.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,420.68 : 128,087.99 = 28,474.41 : x
  2. Step 2: Convert to fraction form
    85,420.68/128,087.99 = 28,474.41/x
  3. Step 3: Cross multiply
    85,420.68x = 128,087.99 × 28,474.41
  4. Step 4: Simplify right side
    85,420.68x = 3,647,229,800.96
  5. Step 5: Solve for x
    x = 3,647,229,800.96/85,420.68
  6. Step 6: Final answer
    x = 42,697.27

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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.