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Finding the Fourth Proportional to 90,475.79, 135,745.47 and 40,551.44

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Solution

The fourth proportional to 90,475.79, 135,745.47 and 40,551.44 is: 60,841.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,475.79 : 135,745.47 = 40,551.44 : x
  2. Step 2: Convert to fraction form
    90,475.79/135,745.47 = 40,551.44/x
  3. Step 3: Cross multiply
    90,475.79x = 135,745.47 × 40,551.44
  4. Step 4: Simplify right side
    90,475.79x = 5,504,673,603.25
  5. Step 5: Solve for x
    x = 5,504,673,603.25/90,475.79
  6. Step 6: Final answer
    x = 60,841.40

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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.