Home / 142,647.72-196,837.89-78,969.54

Finding the Fourth Proportional to 142,647.72, 196,837.89 and 78,969.54

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Solution

The fourth proportional to 142,647.72, 196,837.89 and 78,969.54 is: 108,969.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,647.72 : 196,837.89 = 78,969.54 : x
  2. Step 2: Convert to fraction form
    142,647.72/196,837.89 = 78,969.54/x
  3. Step 3: Cross multiply
    142,647.72x = 196,837.89 × 78,969.54
  4. Step 4: Simplify right side
    142,647.72x = 15,544,197,627.87
  5. Step 5: Solve for x
    x = 15,544,197,627.87/142,647.72
  6. Step 6: Final answer
    x = 108,969.13

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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.