Home / 81,136.86-121,506.57-67,010.46

Finding the Fourth Proportional to 81,136.86, 121,506.57 and 67,010.46

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Solution

The fourth proportional to 81,136.86, 121,506.57 and 67,010.46 is: 100,351.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,136.86 : 121,506.57 = 67,010.46 : x
  2. Step 2: Convert to fraction form
    81,136.86/121,506.57 = 67,010.46/x
  3. Step 3: Cross multiply
    81,136.86x = 121,506.57 × 67,010.46
  4. Step 4: Simplify right side
    81,136.86x = 8,142,211,148.72
  5. Step 5: Solve for x
    x = 8,142,211,148.72/81,136.86
  6. Step 6: Final answer
    x = 100,351.57

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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.