Home / 81,653.85-122,433.10-31,675.55

Finding the Fourth Proportional to 81,653.85, 122,433.10 and 31,675.55

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Solution

The fourth proportional to 81,653.85, 122,433.10 and 31,675.55 is: 47,494.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,653.85 : 122,433.10 = 31,675.55 : x
  2. Step 2: Convert to fraction form
    81,653.85/122,433.10 = 31,675.55/x
  3. Step 3: Cross multiply
    81,653.85x = 122,433.10 × 31,675.55
  4. Step 4: Simplify right side
    81,653.85x = 3,878,135,168.54
  5. Step 5: Solve for x
    x = 3,878,135,168.54/81,653.85
  6. Step 6: Final answer
    x = 47,494.83

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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.