Home / 85,487.28-128,234.52-23,157.72

Finding the Fourth Proportional to 85,487.28, 128,234.52 and 23,157.72

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Solution

The fourth proportional to 85,487.28, 128,234.52 and 23,157.72 is: 34,737.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,487.28 : 128,234.52 = 23,157.72 : x
  2. Step 2: Convert to fraction form
    85,487.28/128,234.52 = 23,157.72/x
  3. Step 3: Cross multiply
    85,487.28x = 128,234.52 × 23,157.72
  4. Step 4: Simplify right side
    85,487.28x = 2,969,619,108.49
  5. Step 5: Solve for x
    x = 2,969,619,108.49/85,487.28
  6. Step 6: Final answer
    x = 34,737.56

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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.