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Finding the Fourth Proportional to 47,059.48, 70,545.90 and 20,388.71

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Solution

The fourth proportional to 47,059.48, 70,545.90 and 20,388.71 is: 30,564.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,059.48 : 70,545.90 = 20,388.71 : x
  2. Step 2: Convert to fraction form
    47,059.48/70,545.90 = 20,388.71/x
  3. Step 3: Cross multiply
    47,059.48x = 70,545.90 × 20,388.71
  4. Step 4: Simplify right side
    47,059.48x = 1,438,339,896.79
  5. Step 5: Solve for x
    x = 1,438,339,896.79/47,059.48
  6. Step 6: Final answer
    x = 30,564.30

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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.