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Finding the Fourth Proportional to 70,107.53, 105,141.85 and 20,174.06

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Solution

The fourth proportional to 70,107.53, 105,141.85 and 20,174.06 is: 30,255.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,107.53 : 105,141.85 = 20,174.06 : x
  2. Step 2: Convert to fraction form
    70,107.53/105,141.85 = 20,174.06/x
  3. Step 3: Cross multiply
    70,107.53x = 105,141.85 × 20,174.06
  4. Step 4: Simplify right side
    70,107.53x = 2,121,138,202.83
  5. Step 5: Solve for x
    x = 2,121,138,202.83/70,107.53
  6. Step 6: Final answer
    x = 30,255.50

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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.