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Finding the Fourth Proportional to 137,090.54, 189,202.53 and 76,664.54

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Solution

The fourth proportional to 137,090.54, 189,202.53 and 76,664.54 is: 105,806.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,090.54 : 189,202.53 = 76,664.54 : x
  2. Step 2: Convert to fraction form
    137,090.54/189,202.53 = 76,664.54/x
  3. Step 3: Cross multiply
    137,090.54x = 189,202.53 × 76,664.54
  4. Step 4: Simplify right side
    137,090.54x = 14,505,125,689.78
  5. Step 5: Solve for x
    x = 14,505,125,689.78/137,090.54
  6. Step 6: Final answer
    x = 105,806.90

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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.