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Finding the Fourth Proportional to 143,646.50, 215,469.76 and 45,150.50

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Solution

The fourth proportional to 143,646.50, 215,469.76 and 45,150.50 is: 67,725.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,646.50 : 215,469.76 = 45,150.50 : x
  2. Step 2: Convert to fraction form
    143,646.50/215,469.76 = 45,150.50/x
  3. Step 3: Cross multiply
    143,646.50x = 215,469.76 × 45,150.50
  4. Step 4: Simplify right side
    143,646.50x = 9,728,567,398.88
  5. Step 5: Solve for x
    x = 9,728,567,398.88/143,646.50
  6. Step 6: Final answer
    x = 67,725.75

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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.