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Finding the Fourth Proportional to 52,980.36, 79,439.75 and 21,364.54

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Solution

The fourth proportional to 52,980.36, 79,439.75 and 21,364.54 is: 32,034.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,980.36 : 79,439.75 = 21,364.54 : x
  2. Step 2: Convert to fraction form
    52,980.36/79,439.75 = 21,364.54/x
  3. Step 3: Cross multiply
    52,980.36x = 79,439.75 × 21,364.54
  4. Step 4: Simplify right side
    52,980.36x = 1,697,193,319.27
  5. Step 5: Solve for x
    x = 1,697,193,319.27/52,980.36
  6. Step 6: Final answer
    x = 32,034.39

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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.