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Finding the Fourth Proportional to 135,707.60, 203,755.80 and 76,658.60

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Solution

The fourth proportional to 135,707.60, 203,755.80 and 76,658.60 is: 115,097.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,707.60 : 203,755.80 = 76,658.60 : x
  2. Step 2: Convert to fraction form
    135,707.60/203,755.80 = 76,658.60/x
  3. Step 3: Cross multiply
    135,707.60x = 203,755.80 × 76,658.60
  4. Step 4: Simplify right side
    135,707.60x = 15,619,634,369.88
  5. Step 5: Solve for x
    x = 15,619,634,369.88/135,707.60
  6. Step 6: Final answer
    x = 115,097.71

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1.5x scale

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.