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Finding the Fourth Proportional to 100,628.70, 150,943.05 and 71,104.20

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Solution

The fourth proportional to 100,628.70, 150,943.05 and 71,104.20 is: 106,656.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,628.70 : 150,943.05 = 71,104.20 : x
  2. Step 2: Convert to fraction form
    100,628.70/150,943.05 = 71,104.20/x
  3. Step 3: Cross multiply
    100,628.70x = 150,943.05 × 71,104.20
  4. Step 4: Simplify right side
    100,628.70x = 10,732,684,815.81
  5. Step 5: Solve for x
    x = 10,732,684,815.81/100,628.70
  6. Step 6: Final answer
    x = 106,656.30

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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.