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Finding the Fourth Proportional to 135,903.89, 187,546.64 and 74,651.28

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Solution

The fourth proportional to 135,903.89, 187,546.64 and 74,651.28 is: 103,018.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,903.89 : 187,546.64 = 74,651.28 : x
  2. Step 2: Convert to fraction form
    135,903.89/187,546.64 = 74,651.28/x
  3. Step 3: Cross multiply
    135,903.89x = 187,546.64 × 74,651.28
  4. Step 4: Simplify right side
    135,903.89x = 14,000,596,362.44
  5. Step 5: Solve for x
    x = 14,000,596,362.44/135,903.89
  6. Step 6: Final answer
    x = 103,018.37

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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.