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Finding the Fourth Proportional to 92,912.60, 128,217.23 and 54,147.94

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Solution

The fourth proportional to 92,912.60, 128,217.23 and 54,147.94 is: 74,722.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,912.60 : 128,217.23 = 54,147.94 : x
  2. Step 2: Convert to fraction form
    92,912.60/128,217.23 = 54,147.94/x
  3. Step 3: Cross multiply
    92,912.60x = 128,217.23 × 54,147.94
  4. Step 4: Simplify right side
    92,912.60x = 6,942,698,877.01
  5. Step 5: Solve for x
    x = 6,942,698,877.01/92,912.60
  6. Step 6: Final answer
    x = 74,722.90

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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.