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Finding the Fourth Proportional to 143,367.52, 197,848.62 and 78,840.16

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Solution

The fourth proportional to 143,367.52, 197,848.62 and 78,840.16 is: 108,800.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,367.52 : 197,848.62 = 78,840.16 : x
  2. Step 2: Convert to fraction form
    143,367.52/197,848.62 = 78,840.16/x
  3. Step 3: Cross multiply
    143,367.52x = 197,848.62 × 78,840.16
  4. Step 4: Simplify right side
    143,367.52x = 15,598,416,856.58
  5. Step 5: Solve for x
    x = 15,598,416,856.58/143,367.52
  6. Step 6: Final answer
    x = 108,800.21

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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.