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Finding the Fourth Proportional to 131,978.40, 197,967.60 and 43,234.80

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Solution

The fourth proportional to 131,978.40, 197,967.60 and 43,234.80 is: 64,852.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,978.40 : 197,967.60 = 43,234.80 : x
  2. Step 2: Convert to fraction form
    131,978.40/197,967.60 = 43,234.80/x
  3. Step 3: Cross multiply
    131,978.40x = 197,967.60 × 43,234.80
  4. Step 4: Simplify right side
    131,978.40x = 8,559,089,592.48
  5. Step 5: Solve for x
    x = 8,559,089,592.48/131,978.40
  6. Step 6: Final answer
    x = 64,852.20

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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.