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Finding the Fourth Proportional to 147,785, 203,944.38 and 80,717

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Solution

The fourth proportional to 147,785, 203,944.38 and 80,717 is: 111,390.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,785 : 203,944.38 = 80,717 : x
  2. Step 2: Convert to fraction form
    147,785/203,944.38 = 80,717/x
  3. Step 3: Cross multiply
    147,785x = 203,944.38 × 80,717
  4. Step 4: Simplify right side
    147,785x = 16,461,778,520.46
  5. Step 5: Solve for x
    x = 16,461,778,520.46/147,785
  6. Step 6: Final answer
    x = 111,390.05

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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.