Home / 123,480.90-185,315.05-81,346.60

Finding the Fourth Proportional to 123,480.90, 185,315.05 and 81,346.60

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Solution

The fourth proportional to 123,480.90, 185,315.05 and 81,346.60 is: 122,081.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,480.90 : 185,315.05 = 81,346.60 : x
  2. Step 2: Convert to fraction form
    123,480.90/185,315.05 = 81,346.60/x
  3. Step 3: Cross multiply
    123,480.90x = 185,315.05 × 81,346.60
  4. Step 4: Simplify right side
    123,480.90x = 15,074,749,246.33
  5. Step 5: Solve for x
    x = 15,074,749,246.33/123,480.90
  6. Step 6: Final answer
    x = 122,081.63

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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.