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Finding the Fourth Proportional to 52,488.72, 78,745.50 and 20,900.61

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Solution

The fourth proportional to 52,488.72, 78,745.50 and 20,900.61 is: 31,355.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,488.72 : 78,745.50 = 20,900.61 : x
  2. Step 2: Convert to fraction form
    52,488.72/78,745.50 = 20,900.61/x
  3. Step 3: Cross multiply
    52,488.72x = 78,745.50 × 20,900.61
  4. Step 4: Simplify right side
    52,488.72x = 1,645,828,984.76
  5. Step 5: Solve for x
    x = 1,645,828,984.76/52,488.72
  6. Step 6: Final answer
    x = 31,355.86

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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.