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Finding the Fourth Proportional to 100,449.76, 150,491 and 47,043.76

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Solution

The fourth proportional to 100,449.76, 150,491 and 47,043.76 is: 70,479.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,449.76 : 150,491 = 47,043.76 : x
  2. Step 2: Convert to fraction form
    100,449.76/150,491 = 47,043.76/x
  3. Step 3: Cross multiply
    100,449.76x = 150,491 × 47,043.76
  4. Step 4: Simplify right side
    100,449.76x = 7,079,662,486.16
  5. Step 5: Solve for x
    x = 7,079,662,486.16/100,449.76
  6. Step 6: Final answer
    x = 70,479.64

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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.