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Finding the Fourth Proportional to 70,141.76, 105,213.72 and 20,226.32

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Solution

The fourth proportional to 70,141.76, 105,213.72 and 20,226.32 is: 30,339.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,141.76 : 105,213.72 = 20,226.32 : x
  2. Step 2: Convert to fraction form
    70,141.76/105,213.72 = 20,226.32/x
  3. Step 3: Cross multiply
    70,141.76x = 105,213.72 × 20,226.32
  4. Step 4: Simplify right side
    70,141.76x = 2,128,086,369.11
  5. Step 5: Solve for x
    x = 2,128,086,369.11/70,141.76
  6. Step 6: Final answer
    x = 30,339.79

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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.