Home / 81,931.42-122,771.94-55,178.49

Finding the Fourth Proportional to 81,931.42, 122,771.94 and 55,178.49

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Solution

The fourth proportional to 81,931.42, 122,771.94 and 55,178.49 is: 82,683.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,931.42 : 122,771.94 = 55,178.49 : x
  2. Step 2: Convert to fraction form
    81,931.42/122,771.94 = 55,178.49/x
  3. Step 3: Cross multiply
    81,931.42x = 122,771.94 × 55,178.49
  4. Step 4: Simplify right side
    81,931.42x = 6,774,370,263.57
  5. Step 5: Solve for x
    x = 6,774,370,263.57/81,931.42
  6. Step 6: Final answer
    x = 82,683.42

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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.