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Finding the Fourth Proportional to 136,690.40, 205,035.60 and 122,693.60

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Solution

The fourth proportional to 136,690.40, 205,035.60 and 122,693.60 is: 184,040.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,690.40 : 205,035.60 = 122,693.60 : x
  2. Step 2: Convert to fraction form
    136,690.40/205,035.60 = 122,693.60/x
  3. Step 3: Cross multiply
    136,690.40x = 205,035.60 × 122,693.60
  4. Step 4: Simplify right side
    136,690.40x = 25,156,555,892.16
  5. Step 5: Solve for x
    x = 25,156,555,892.16/136,690.40
  6. Step 6: Final answer
    x = 184,040.40

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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.