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Finding the Fourth Proportional to 47,137.69, 70,679.80 and 15,539.18

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Solution

The fourth proportional to 47,137.69, 70,679.80 and 15,539.18 is: 23,299.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,137.69 : 70,679.80 = 15,539.18 : x
  2. Step 2: Convert to fraction form
    47,137.69/70,679.80 = 15,539.18/x
  3. Step 3: Cross multiply
    47,137.69x = 70,679.80 × 15,539.18
  4. Step 4: Simplify right side
    47,137.69x = 1,098,306,134.56
  5. Step 5: Solve for x
    x = 1,098,306,134.56/47,137.69
  6. Step 6: Final answer
    x = 23,299.96

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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.