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Finding the Fourth Proportional to 118,949.80, 178,424.70 and 118,130.60

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Solution

The fourth proportional to 118,949.80, 178,424.70 and 118,130.60 is: 177,195.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,949.80 : 178,424.70 = 118,130.60 : x
  2. Step 2: Convert to fraction form
    118,949.80/178,424.70 = 118,130.60/x
  3. Step 3: Cross multiply
    118,949.80x = 178,424.70 × 118,130.60
  4. Step 4: Simplify right side
    118,949.80x = 21,077,416,865.82
  5. Step 5: Solve for x
    x = 21,077,416,865.82/118,949.80
  6. Step 6: Final answer
    x = 177,195.90

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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.