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Finding the Fourth Proportional to 135,054.56, 186,374.58 and 74,629.38

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Solution

The fourth proportional to 135,054.56, 186,374.58 and 74,629.38 is: 102,988.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,054.56 : 186,374.58 = 74,629.38 : x
  2. Step 2: Convert to fraction form
    135,054.56/186,374.58 = 74,629.38/x
  3. Step 3: Cross multiply
    135,054.56x = 186,374.58 × 74,629.38
  4. Step 4: Simplify right side
    135,054.56x = 13,909,019,353.16
  5. Step 5: Solve for x
    x = 13,909,019,353.16/135,054.56
  6. Step 6: Final answer
    x = 102,988.15

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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.