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Finding the Fourth Proportional to 143,913.60, 215,481.60 and 112,809.60

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Solution

The fourth proportional to 143,913.60, 215,481.60 and 112,809.60 is: 168,909.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,913.60 : 215,481.60 = 112,809.60 : x
  2. Step 2: Convert to fraction form
    143,913.60/215,481.60 = 112,809.60/x
  3. Step 3: Cross multiply
    143,913.60x = 215,481.60 × 112,809.60
  4. Step 4: Simplify right side
    143,913.60x = 24,308,393,103.36
  5. Step 5: Solve for x
    x = 24,308,393,103.36/143,913.60
  6. Step 6: Final answer
    x = 168,909.63

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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.