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Finding the Fourth Proportional to 119,991.54, 165,590.80 and 72,234.74

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Solution

The fourth proportional to 119,991.54, 165,590.80 and 72,234.74 is: 99,685.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,991.54 : 165,590.80 = 72,234.74 : x
  2. Step 2: Convert to fraction form
    119,991.54/165,590.80 = 72,234.74/x
  3. Step 3: Cross multiply
    119,991.54x = 165,590.80 × 72,234.74
  4. Step 4: Simplify right side
    119,991.54x = 11,961,408,384.39
  5. Step 5: Solve for x
    x = 11,961,408,384.39/119,991.54
  6. Step 6: Final answer
    x = 99,685.43

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.