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Finding the Fourth Proportional to 131,361.60, 196,912.80 and 64,747.20

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Solution

The fourth proportional to 131,361.60, 196,912.80 and 64,747.20 is: 97,056.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,361.60 : 196,912.80 = 64,747.20 : x
  2. Step 2: Convert to fraction form
    131,361.60/196,912.80 = 64,747.20/x
  3. Step 3: Cross multiply
    131,361.60x = 196,912.80 × 64,747.20
  4. Step 4: Simplify right side
    131,361.60x = 12,749,552,444.16
  5. Step 5: Solve for x
    x = 12,749,552,444.16/131,361.60
  6. Step 6: Final answer
    x = 97,056.92

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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.