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Finding the Fourth Proportional to 143,670, 215,539.56 and 45,174

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Solution

The fourth proportional to 143,670, 215,539.56 and 45,174 is: 67,771.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,670 : 215,539.56 = 45,174 : x
  2. Step 2: Convert to fraction form
    143,670/215,539.56 = 45,174/x
  3. Step 3: Cross multiply
    143,670x = 215,539.56 × 45,174
  4. Step 4: Simplify right side
    143,670x = 9,736,784,083.44
  5. Step 5: Solve for x
    x = 9,736,784,083.44/143,670
  6. Step 6: Final answer
    x = 67,771.87

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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.