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Finding the Fourth Proportional to 155,169.70, 214,162.05 and 91,503.70

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Solution

The fourth proportional to 155,169.70, 214,162.05 and 91,503.70 is: 126,291.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,169.70 : 214,162.05 = 91,503.70 : x
  2. Step 2: Convert to fraction form
    155,169.70/214,162.05 = 91,503.70/x
  3. Step 3: Cross multiply
    155,169.70x = 214,162.05 × 91,503.70
  4. Step 4: Simplify right side
    155,169.70x = 19,596,619,974.59
  5. Step 5: Solve for x
    x = 19,596,619,974.59/155,169.70
  6. Step 6: Final answer
    x = 126,291.54

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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.