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Finding the Fourth Proportional to 147,809.26, 203,991.78 and 87,399.46

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Solution

The fourth proportional to 147,809.26, 203,991.78 and 87,399.46 is: 120,620.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,809.26 : 203,991.78 = 87,399.46 : x
  2. Step 2: Convert to fraction form
    147,809.26/203,991.78 = 87,399.46/x
  3. Step 3: Cross multiply
    147,809.26x = 203,991.78 × 87,399.46
  4. Step 4: Simplify right side
    147,809.26x = 17,828,771,416.44
  5. Step 5: Solve for x
    x = 17,828,771,416.44/147,809.26
  6. Step 6: Final answer
    x = 120,620.12

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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.