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Finding the Fourth Proportional to 99,992.60, 149,745.90 and 53,142.20

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Solution

The fourth proportional to 99,992.60, 149,745.90 and 53,142.20 is: 79,584.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,992.60 : 149,745.90 = 53,142.20 : x
  2. Step 2: Convert to fraction form
    99,992.60/149,745.90 = 53,142.20/x
  3. Step 3: Cross multiply
    99,992.60x = 149,745.90 × 53,142.20
  4. Step 4: Simplify right side
    99,992.60x = 7,957,826,566.98
  5. Step 5: Solve for x
    x = 7,957,826,566.98/99,992.60
  6. Step 6: Final answer
    x = 79,584.15

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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.