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Finding the Fourth Proportional to 52,586.20, 78,879.30 and 40,835.80

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Solution

The fourth proportional to 52,586.20, 78,879.30 and 40,835.80 is: 61,253.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,586.20 : 78,879.30 = 40,835.80 : x
  2. Step 2: Convert to fraction form
    52,586.20/78,879.30 = 40,835.80/x
  3. Step 3: Cross multiply
    52,586.20x = 78,879.30 × 40,835.80
  4. Step 4: Simplify right side
    52,586.20x = 3,221,099,318.94
  5. Step 5: Solve for x
    x = 3,221,099,318.94/52,586.20
  6. Step 6: Final answer
    x = 61,253.70

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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.