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Finding the Fourth Proportional to 92,912.10, 128,216.54 and 54,147.44

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Solution

The fourth proportional to 92,912.10, 128,216.54 and 54,147.44 is: 74,722.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,912.10 : 128,216.54 = 54,147.44 : x
  2. Step 2: Convert to fraction form
    92,912.10/128,216.54 = 54,147.44/x
  3. Step 3: Cross multiply
    92,912.10x = 128,216.54 × 54,147.44
  4. Step 4: Simplify right side
    92,912.10x = 6,942,597,406.66
  5. Step 5: Solve for x
    x = 6,942,597,406.66/92,912.10
  6. Step 6: Final answer
    x = 74,722.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.