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Finding the Fourth Proportional to 52,906.80, 79,360.20 and 52,129.20

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Solution

The fourth proportional to 52,906.80, 79,360.20 and 52,129.20 is: 78,193.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,906.80 : 79,360.20 = 52,129.20 : x
  2. Step 2: Convert to fraction form
    52,906.80/79,360.20 = 52,129.20/x
  3. Step 3: Cross multiply
    52,906.80x = 79,360.20 × 52,129.20
  4. Step 4: Simplify right side
    52,906.80x = 4,136,983,737.84
  5. Step 5: Solve for x
    x = 4,136,983,737.84/52,906.80
  6. Step 6: Final answer
    x = 78,193.80

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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.