Home / 149,118.62-205,784.58-81,136.07

Finding the Fourth Proportional to 149,118.62, 205,784.58 and 81,136.07

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Solution

The fourth proportional to 149,118.62, 205,784.58 and 81,136.07 is: 111,968.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,118.62 : 205,784.58 = 81,136.07 : x
  2. Step 2: Convert to fraction form
    149,118.62/205,784.58 = 81,136.07/x
  3. Step 3: Cross multiply
    149,118.62x = 205,784.58 × 81,136.07
  4. Step 4: Simplify right side
    149,118.62x = 16,696,550,653.20
  5. Step 5: Solve for x
    x = 16,696,550,653.20/149,118.62
  6. Step 6: Final answer
    x = 111,968.25

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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.