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Finding the Fourth Proportional to 145,137.86, 217,789.70 and 56,379.81

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Solution

The fourth proportional to 145,137.86, 217,789.70 and 56,379.81 is: 84,601.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,137.86 : 217,789.70 = 56,379.81 : x
  2. Step 2: Convert to fraction form
    145,137.86/217,789.70 = 56,379.81/x
  3. Step 3: Cross multiply
    145,137.86x = 217,789.70 × 56,379.81
  4. Step 4: Simplify right side
    145,137.86x = 12,278,941,624.06
  5. Step 5: Solve for x
    x = 12,278,941,624.06/145,137.86
  6. Step 6: Final answer
    x = 84,601.92

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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.