Home / 142,442.18-196,566.84-78,778.64

Finding the Fourth Proportional to 142,442.18, 196,566.84 and 78,778.64

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Solution

The fourth proportional to 142,442.18, 196,566.84 and 78,778.64 is: 108,712.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,442.18 : 196,566.84 = 78,778.64 : x
  2. Step 2: Convert to fraction form
    142,442.18/196,566.84 = 78,778.64/x
  3. Step 3: Cross multiply
    142,442.18x = 196,566.84 × 78,778.64
  4. Step 4: Simplify right side
    142,442.18x = 15,485,268,324.30
  5. Step 5: Solve for x
    x = 15,485,268,324.30/142,442.18
  6. Step 6: Final answer
    x = 108,712.66

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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.