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Finding the Fourth Proportional to 75,816.20, 113,724.30 and 20,412.20

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Solution

The fourth proportional to 75,816.20, 113,724.30 and 20,412.20 is: 30,618.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,816.20 : 113,724.30 = 20,412.20 : x
  2. Step 2: Convert to fraction form
    75,816.20/113,724.30 = 20,412.20/x
  3. Step 3: Cross multiply
    75,816.20x = 113,724.30 × 20,412.20
  4. Step 4: Simplify right side
    75,816.20x = 2,321,363,156.46
  5. Step 5: Solve for x
    x = 2,321,363,156.46/75,816.20
  6. Step 6: Final answer
    x = 30,618.30

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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.