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Finding the Fourth Proportional to 118,967.48, 178,213.30 and 71,556.40

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Solution

The fourth proportional to 118,967.48, 178,213.30 and 71,556.40 is: 107,191.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,967.48 : 178,213.30 = 71,556.40 : x
  2. Step 2: Convert to fraction form
    118,967.48/178,213.30 = 71,556.40/x
  3. Step 3: Cross multiply
    118,967.48x = 178,213.30 × 71,556.40
  4. Step 4: Simplify right side
    118,967.48x = 12,752,301,221.55
  5. Step 5: Solve for x
    x = 12,752,301,221.55/118,967.48
  6. Step 6: Final answer
    x = 107,191.48

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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.