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Finding the Fourth Proportional to 100,411.60, 150,617.40 and 30,281.80

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Solution

The fourth proportional to 100,411.60, 150,617.40 and 30,281.80 is: 45,422.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,411.60 : 150,617.40 = 30,281.80 : x
  2. Step 2: Convert to fraction form
    100,411.60/150,617.40 = 30,281.80/x
  3. Step 3: Cross multiply
    100,411.60x = 150,617.40 × 30,281.80
  4. Step 4: Simplify right side
    100,411.60x = 4,560,965,983.32
  5. Step 5: Solve for x
    x = 4,560,965,983.32/100,411.60
  6. Step 6: Final answer
    x = 45,422.70

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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.