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Finding the Fourth Proportional to 198,656.60, 297,978.25 and 86,336.82

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Solution

The fourth proportional to 198,656.60, 297,978.25 and 86,336.82 is: 129,502.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,656.60 : 297,978.25 = 86,336.82 : x
  2. Step 2: Convert to fraction form
    198,656.60/297,978.25 = 86,336.82/x
  3. Step 3: Cross multiply
    198,656.60x = 297,978.25 × 86,336.82
  4. Step 4: Simplify right side
    198,656.60x = 25,726,494,534.17
  5. Step 5: Solve for x
    x = 25,726,494,534.17/198,656.60
  6. Step 6: Final answer
    x = 129,502.34

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.