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Finding the Fourth Proportional to 145,309.95, 217,847.31 and 45,418.73

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Solution

The fourth proportional to 145,309.95, 217,847.31 and 45,418.73 is: 68,091.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,309.95 : 217,847.31 = 45,418.73 : x
  2. Step 2: Convert to fraction form
    145,309.95/217,847.31 = 45,418.73/x
  3. Step 3: Cross multiply
    145,309.95x = 217,847.31 × 45,418.73
  4. Step 4: Simplify right side
    145,309.95x = 9,894,347,064.88
  5. Step 5: Solve for x
    x = 9,894,347,064.88/145,309.95
  6. Step 6: Final answer
    x = 68,091.33

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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.