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Finding the Fourth Proportional to 92,190.80, 138,318.60 and 39,603.44

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Solution

The fourth proportional to 92,190.80, 138,318.60 and 39,603.44 is: 59,419.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,190.80 : 138,318.60 = 39,603.44 : x
  2. Step 2: Convert to fraction form
    92,190.80/138,318.60 = 39,603.44/x
  3. Step 3: Cross multiply
    92,190.80x = 138,318.60 × 39,603.44
  4. Step 4: Simplify right side
    92,190.80x = 5,477,892,375.98
  5. Step 5: Solve for x
    x = 5,477,892,375.98/92,190.80
  6. Step 6: Final answer
    x = 59,419.08

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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.