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Finding the Fourth Proportional to 174,212.80, 261,405.60 and 99,390.40

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Solution

The fourth proportional to 174,212.80, 261,405.60 and 99,390.40 is: 149,134.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    174,212.80 : 261,405.60 = 99,390.40 : x
  2. Step 2: Convert to fraction form
    174,212.80/261,405.60 = 99,390.40/x
  3. Step 3: Cross multiply
    174,212.80x = 261,405.60 × 99,390.40
  4. Step 4: Simplify right side
    174,212.80x = 25,981,207,146.24
  5. Step 5: Solve for x
    x = 25,981,207,146.24/174,212.80
  6. Step 6: Final answer
    x = 149,134.89

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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.