Home / 123,480.40-185,314.29-81,346.09

Finding the Fourth Proportional to 123,480.40, 185,314.29 and 81,346.09

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Solution

The fourth proportional to 123,480.40, 185,314.29 and 81,346.09 is: 122,080.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,480.40 : 185,314.29 = 81,346.09 : x
  2. Step 2: Convert to fraction form
    123,480.40/185,314.29 = 81,346.09/x
  3. Step 3: Cross multiply
    123,480.40x = 185,314.29 × 81,346.09
  4. Step 4: Simplify right side
    123,480.40x = 15,074,592,912.63
  5. Step 5: Solve for x
    x = 15,074,592,912.63/123,480.40
  6. Step 6: Final answer
    x = 122,080.86

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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.