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Finding the Fourth Proportional to 118,112.60, 177,242.90 and 78,697.41

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Solution

The fourth proportional to 118,112.60, 177,242.90 and 78,697.41 is: 118,095.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,112.60 : 177,242.90 = 78,697.41 : x
  2. Step 2: Convert to fraction form
    118,112.60/177,242.90 = 78,697.41/x
  3. Step 3: Cross multiply
    118,112.60x = 177,242.90 × 78,697.41
  4. Step 4: Simplify right side
    118,112.60x = 13,948,556,777.40
  5. Step 5: Solve for x
    x = 13,948,556,777.40/118,112.60
  6. Step 6: Final answer
    x = 118,095.42

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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.