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Finding the Fourth Proportional to 70,236.48, 105,339.12 and 20,305.68

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Solution

The fourth proportional to 70,236.48, 105,339.12 and 20,305.68 is: 30,454.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,236.48 : 105,339.12 = 20,305.68 : x
  2. Step 2: Convert to fraction form
    70,236.48/105,339.12 = 20,305.68/x
  3. Step 3: Cross multiply
    70,236.48x = 105,339.12 × 20,305.68
  4. Step 4: Simplify right side
    70,236.48x = 2,138,982,462.20
  5. Step 5: Solve for x
    x = 2,138,982,462.20/70,236.48
  6. Step 6: Final answer
    x = 30,454.01

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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.