Home / 142,379.68-196,466.64-78,708.64

Finding the Fourth Proportional to 142,379.68, 196,466.64 and 78,708.64

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Solution

The fourth proportional to 142,379.68, 196,466.64 and 78,708.64 is: 108,608.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,379.68 : 196,466.64 = 78,708.64 : x
  2. Step 2: Convert to fraction form
    142,379.68/196,466.64 = 78,708.64/x
  3. Step 3: Cross multiply
    142,379.68x = 196,466.64 × 78,708.64
  4. Step 4: Simplify right side
    142,379.68x = 15,463,622,039.77
  5. Step 5: Solve for x
    x = 15,463,622,039.77/142,379.68
  6. Step 6: Final answer
    x = 108,608.35

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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.