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Finding the Fourth Proportional to 101,108.58, 151,662.12 and 78,940.50

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Solution

The fourth proportional to 101,108.58, 151,662.12 and 78,940.50 is: 118,410.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,108.58 : 151,662.12 = 78,940.50 : x
  2. Step 2: Convert to fraction form
    101,108.58/151,662.12 = 78,940.50/x
  3. Step 3: Cross multiply
    101,108.58x = 151,662.12 × 78,940.50
  4. Step 4: Simplify right side
    101,108.58x = 11,972,283,583.86
  5. Step 5: Solve for x
    x = 11,972,283,583.86/101,108.58
  6. Step 6: Final answer
    x = 118,410.16

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Why These Related Problems?

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