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Finding the Fourth Proportional to 145,137.61, 217,789.32 and 56,379.56

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Solution

The fourth proportional to 145,137.61, 217,789.32 and 56,379.56 is: 84,601.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,137.61 : 217,789.32 = 56,379.56 : x
  2. Step 2: Convert to fraction form
    145,137.61/217,789.32 = 56,379.56/x
  3. Step 3: Cross multiply
    145,137.61x = 217,789.32 × 56,379.56
  4. Step 4: Simplify right side
    145,137.61x = 12,278,866,034.30
  5. Step 5: Solve for x
    x = 12,278,866,034.30/145,137.61
  6. Step 6: Final answer
    x = 84,601.55

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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.