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Finding the Fourth Proportional to 100,471.20, 150,855.60 and 56,186.40

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Solution

The fourth proportional to 100,471.20, 150,855.60 and 56,186.40 is: 84,362.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,471.20 : 150,855.60 = 56,186.40 : x
  2. Step 2: Convert to fraction form
    100,471.20/150,855.60 = 56,186.40/x
  3. Step 3: Cross multiply
    100,471.20x = 150,855.60 × 56,186.40
  4. Step 4: Simplify right side
    100,471.20x = 8,476,033,083.84
  5. Step 5: Solve for x
    x = 8,476,033,083.84/100,471.20
  6. Step 6: Final answer
    x = 84,362.81

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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.