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Finding the Fourth Proportional to 70,168.67, 105,228.20 and 20,235.29

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Solution

The fourth proportional to 70,168.67, 105,228.20 and 20,235.29 is: 30,345.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,168.67 : 105,228.20 = 20,235.29 : x
  2. Step 2: Convert to fraction form
    70,168.67/105,228.20 = 20,235.29/x
  3. Step 3: Cross multiply
    70,168.67x = 105,228.20 × 20,235.29
  4. Step 4: Simplify right side
    70,168.67x = 2,129,322,515.86
  5. Step 5: Solve for x
    x = 2,129,322,515.86/70,168.67
  6. Step 6: Final answer
    x = 30,345.77

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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.