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Finding the Fourth Proportional to 140,659.75, 210,989.67 and 42,163.75

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Solution

The fourth proportional to 140,659.75, 210,989.67 and 42,163.75 is: 63,245.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,659.75 : 210,989.67 = 42,163.75 : x
  2. Step 2: Convert to fraction form
    140,659.75/210,989.67 = 42,163.75/x
  3. Step 3: Cross multiply
    140,659.75x = 210,989.67 × 42,163.75
  4. Step 4: Simplify right side
    140,659.75x = 8,896,115,698.46
  5. Step 5: Solve for x
    x = 8,896,115,698.46/140,659.75
  6. Step 6: Final answer
    x = 63,245.64

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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.