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Finding the Fourth Proportional to 149,168.40, 205,783.20 and 88,705.20

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Solution

The fourth proportional to 149,168.40, 205,783.20 and 88,705.20 is: 122,372.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,168.40 : 205,783.20 = 88,705.20 : x
  2. Step 2: Convert to fraction form
    149,168.40/205,783.20 = 88,705.20/x
  3. Step 3: Cross multiply
    149,168.40x = 205,783.20 × 88,705.20
  4. Step 4: Simplify right side
    149,168.40x = 18,254,039,912.64
  5. Step 5: Solve for x
    x = 18,254,039,912.64/149,168.40
  6. Step 6: Final answer
    x = 122,372.03

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.