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Finding the Fourth Proportional to 143,472.34, 215,234.63 and 47,415.05

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Solution

The fourth proportional to 143,472.34, 215,234.63 and 47,415.05 is: 71,131.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,472.34 : 215,234.63 = 47,415.05 : x
  2. Step 2: Convert to fraction form
    143,472.34/215,234.63 = 47,415.05/x
  3. Step 3: Cross multiply
    143,472.34x = 215,234.63 × 47,415.05
  4. Step 4: Simplify right side
    143,472.34x = 10,205,360,743.18
  5. Step 5: Solve for x
    x = 10,205,360,743.18/143,472.34
  6. Step 6: Final answer
    x = 71,131.21

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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.