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Finding the Fourth Proportional to 135,740.67, 187,318.55 and 74,486.67

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Solution

The fourth proportional to 135,740.67, 187,318.55 and 74,486.67 is: 102,789.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,740.67 : 187,318.55 = 74,486.67 : x
  2. Step 2: Convert to fraction form
    135,740.67/187,318.55 = 74,486.67/x
  3. Step 3: Cross multiply
    135,740.67x = 187,318.55 × 74,486.67
  4. Step 4: Simplify right side
    135,740.67x = 13,952,734,646.30
  5. Step 5: Solve for x
    x = 13,952,734,646.30/135,740.67
  6. Step 6: Final answer
    x = 102,789.64

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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.