Home / 149,136.39-205,804.08-81,151.79

Finding the Fourth Proportional to 149,136.39, 205,804.08 and 81,151.79

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Solution

The fourth proportional to 149,136.39, 205,804.08 and 81,151.79 is: 111,987.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,136.39 : 205,804.08 = 81,151.79 : x
  2. Step 2: Convert to fraction form
    149,136.39/205,804.08 = 81,151.79/x
  3. Step 3: Cross multiply
    149,136.39x = 205,804.08 × 81,151.79
  4. Step 4: Simplify right side
    149,136.39x = 16,701,368,627.57
  5. Step 5: Solve for x
    x = 16,701,368,627.57/149,136.39
  6. Step 6: Final answer
    x = 111,987.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.