Home / 85,960.91-128,942.21-25,989.86

Finding the Fourth Proportional to 85,960.91, 128,942.21 and 25,989.86

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Solution

The fourth proportional to 85,960.91, 128,942.21 and 25,989.86 is: 38,985.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,960.91 : 128,942.21 = 25,989.86 : x
  2. Step 2: Convert to fraction form
    85,960.91/128,942.21 = 25,989.86/x
  3. Step 3: Cross multiply
    85,960.91x = 128,942.21 × 25,989.86
  4. Step 4: Simplify right side
    85,960.91x = 3,351,190,373.32
  5. Step 5: Solve for x
    x = 3,351,190,373.32/85,960.91
  6. Step 6: Final answer
    x = 38,985.05

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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.