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Finding the Fourth Proportional to 145,815.58, 218,859.45 and 74,791.54

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Solution

The fourth proportional to 145,815.58, 218,859.45 and 74,791.54 is: 112,257.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,815.58 : 218,859.45 = 74,791.54 : x
  2. Step 2: Convert to fraction form
    145,815.58/218,859.45 = 74,791.54/x
  3. Step 3: Cross multiply
    145,815.58x = 218,859.45 × 74,791.54
  4. Step 4: Simplify right side
    145,815.58x = 16,368,835,309.05
  5. Step 5: Solve for x
    x = 16,368,835,309.05/145,815.58
  6. Step 6: Final answer
    x = 112,257.11

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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.