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Finding the Fourth Proportional to 52,744.60, 79,088.52 and 21,138.80

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Solution

The fourth proportional to 52,744.60, 79,088.52 and 21,138.80 is: 31,696.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,744.60 : 79,088.52 = 21,138.80 : x
  2. Step 2: Convert to fraction form
    52,744.60/79,088.52 = 21,138.80/x
  3. Step 3: Cross multiply
    52,744.60x = 79,088.52 × 21,138.80
  4. Step 4: Simplify right side
    52,744.60x = 1,671,836,406.58
  5. Step 5: Solve for x
    x = 1,671,836,406.58/52,744.60
  6. Step 6: Final answer
    x = 31,696.83

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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.