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Finding the Fourth Proportional to 118,912.20, 178,368.30 and 113,080.20

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Solution

The fourth proportional to 118,912.20, 178,368.30 and 113,080.20 is: 169,620.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,912.20 : 178,368.30 = 113,080.20 : x
  2. Step 2: Convert to fraction form
    118,912.20/178,368.30 = 113,080.20/x
  3. Step 3: Cross multiply
    118,912.20x = 178,368.30 × 113,080.20
  4. Step 4: Simplify right side
    118,912.20x = 20,169,923,037.66
  5. Step 5: Solve for x
    x = 20,169,923,037.66/118,912.20
  6. Step 6: Final answer
    x = 169,620.30

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1.5x scale

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.