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Finding the Fourth Proportional to 131,978.64, 197,967.96 and 43,232.60

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Solution

The fourth proportional to 131,978.64, 197,967.96 and 43,232.60 is: 64,848.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,978.64 : 197,967.96 = 43,232.60 : x
  2. Step 2: Convert to fraction form
    131,978.64/197,967.96 = 43,232.60/x
  3. Step 3: Cross multiply
    131,978.64x = 197,967.96 × 43,232.60
  4. Step 4: Simplify right side
    131,978.64x = 8,558,669,627.50
  5. Step 5: Solve for x
    x = 8,558,669,627.50/131,978.64
  6. Step 6: Final answer
    x = 64,848.90

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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.