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Finding the Fourth Proportional to 137,353.73, 205,986.92 and 128,388.01

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Solution

The fourth proportional to 137,353.73, 205,986.92 and 128,388.01 is: 192,541.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,353.73 : 205,986.92 = 128,388.01 : x
  2. Step 2: Convert to fraction form
    137,353.73/205,986.92 = 128,388.01/x
  3. Step 3: Cross multiply
    137,353.73x = 205,986.92 × 128,388.01
  4. Step 4: Simplify right side
    137,353.73x = 26,446,250,744.83
  5. Step 5: Solve for x
    x = 26,446,250,744.83/137,353.73
  6. Step 6: Final answer
    x = 192,541.19

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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.