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Finding the Fourth Proportional to 137,039.40, 205,559.10 and 115,388.10

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Solution

The fourth proportional to 137,039.40, 205,559.10 and 115,388.10 is: 173,082.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,039.40 : 205,559.10 = 115,388.10 : x
  2. Step 2: Convert to fraction form
    137,039.40/205,559.10 = 115,388.10/x
  3. Step 3: Cross multiply
    137,039.40x = 205,559.10 × 115,388.10
  4. Step 4: Simplify right side
    137,039.40x = 23,719,073,986.71
  5. Step 5: Solve for x
    x = 23,719,073,986.71/137,039.40
  6. Step 6: Final answer
    x = 173,082.15

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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.