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Finding the Fourth Proportional to 188,475.20, 260,112.40 and 103,608.80

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Solution

The fourth proportional to 188,475.20, 260,112.40 and 103,608.80 is: 142,989.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,475.20 : 260,112.40 = 103,608.80 : x
  2. Step 2: Convert to fraction form
    188,475.20/260,112.40 = 103,608.80/x
  3. Step 3: Cross multiply
    188,475.20x = 260,112.40 × 103,608.80
  4. Step 4: Simplify right side
    188,475.20x = 26,949,933,629.12
  5. Step 5: Solve for x
    x = 26,949,933,629.12/188,475.20
  6. Step 6: Final answer
    x = 142,989.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.