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Finding the Fourth Proportional to 81,745.68, 122,556.36 and 42,277.64

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Solution

The fourth proportional to 81,745.68, 122,556.36 and 42,277.64 is: 63,384.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,745.68 : 122,556.36 = 42,277.64 : x
  2. Step 2: Convert to fraction form
    81,745.68/122,556.36 = 42,277.64/x
  3. Step 3: Cross multiply
    81,745.68x = 122,556.36 × 42,277.64
  4. Step 4: Simplify right side
    81,745.68x = 5,181,393,667.79
  5. Step 5: Solve for x
    x = 5,181,393,667.79/81,745.68
  6. Step 6: Final answer
    x = 63,384.31

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1.5x scale

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.