Home / 78,157.54-117,234.69-18,993.52

Finding the Fourth Proportional to 78,157.54, 117,234.69 and 18,993.52

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Solution

The fourth proportional to 78,157.54, 117,234.69 and 18,993.52 is: 28,489.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,157.54 : 117,234.69 = 18,993.52 : x
  2. Step 2: Convert to fraction form
    78,157.54/117,234.69 = 18,993.52/x
  3. Step 3: Cross multiply
    78,157.54x = 117,234.69 × 18,993.52
  4. Step 4: Simplify right side
    78,157.54x = 2,226,699,429.21
  5. Step 5: Solve for x
    x = 2,226,699,429.21/78,157.54
  6. Step 6: Final answer
    x = 28,489.89

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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.