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Finding the Fourth Proportional to 138,955.68, 207,935.26 and 120,299.89

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Solution

The fourth proportional to 138,955.68, 207,935.26 and 120,299.89 is: 180,018.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,955.68 : 207,935.26 = 120,299.89 : x
  2. Step 2: Convert to fraction form
    138,955.68/207,935.26 = 120,299.89/x
  3. Step 3: Cross multiply
    138,955.68x = 207,935.26 × 120,299.89
  4. Step 4: Simplify right side
    138,955.68x = 25,014,588,905.12
  5. Step 5: Solve for x
    x = 25,014,588,905.12/138,955.68
  6. Step 6: Final answer
    x = 180,018.47

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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.