Home / 142,361.75-196,442.16-78,690.89

Finding the Fourth Proportional to 142,361.75, 196,442.16 and 78,690.89

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Solution

The fourth proportional to 142,361.75, 196,442.16 and 78,690.89 is: 108,584.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,361.75 : 196,442.16 = 78,690.89 : x
  2. Step 2: Convert to fraction form
    142,361.75/196,442.16 = 78,690.89/x
  3. Step 3: Cross multiply
    142,361.75x = 196,442.16 × 78,690.89
  4. Step 4: Simplify right side
    142,361.75x = 15,458,208,403.92
  5. Step 5: Solve for x
    x = 15,458,208,403.92/142,361.75
  6. Step 6: Final answer
    x = 108,584.00

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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.