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Finding the Fourth Proportional to 100,363.20, 150,544.80 and 76,743.60

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Solution

The fourth proportional to 100,363.20, 150,544.80 and 76,743.60 is: 115,115.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,363.20 : 150,544.80 = 76,743.60 : x
  2. Step 2: Convert to fraction form
    100,363.20/150,544.80 = 76,743.60/x
  3. Step 3: Cross multiply
    100,363.20x = 150,544.80 × 76,743.60
  4. Step 4: Simplify right side
    100,363.20x = 11,553,349,913.28
  5. Step 5: Solve for x
    x = 11,553,349,913.28/100,363.20
  6. Step 6: Final answer
    x = 115,115.40

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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.