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Finding the Fourth Proportional to 136,945.60, 205,418.40 and 122,430.40

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Solution

The fourth proportional to 136,945.60, 205,418.40 and 122,430.40 is: 183,645.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,945.60 : 205,418.40 = 122,430.40 : x
  2. Step 2: Convert to fraction form
    136,945.60/205,418.40 = 122,430.40/x
  3. Step 3: Cross multiply
    136,945.60x = 205,418.40 × 122,430.40
  4. Step 4: Simplify right side
    136,945.60x = 25,149,456,879.36
  5. Step 5: Solve for x
    x = 25,149,456,879.36/136,945.60
  6. Step 6: Final answer
    x = 183,645.60

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1.5x scale

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.