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Finding the Fourth Proportional to 85,400.10, 128,122.55 and 32,811.30

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Solution

The fourth proportional to 85,400.10, 128,122.55 and 32,811.30 is: 49,225.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,400.10 : 128,122.55 = 32,811.30 : x
  2. Step 2: Convert to fraction form
    85,400.10/128,122.55 = 32,811.30/x
  3. Step 3: Cross multiply
    85,400.10x = 128,122.55 × 32,811.30
  4. Step 4: Simplify right side
    85,400.10x = 4,203,867,424.82
  5. Step 5: Solve for x
    x = 4,203,867,424.82/85,400.10
  6. Step 6: Final answer
    x = 49,225.56

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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.