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Finding the Fourth Proportional to 136,661.60, 204,992.40 and 48,015.20

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Solution

The fourth proportional to 136,661.60, 204,992.40 and 48,015.20 is: 72,022.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,661.60 : 204,992.40 = 48,015.20 : x
  2. Step 2: Convert to fraction form
    136,661.60/204,992.40 = 48,015.20/x
  3. Step 3: Cross multiply
    136,661.60x = 204,992.40 × 48,015.20
  4. Step 4: Simplify right side
    136,661.60x = 9,842,751,084.48
  5. Step 5: Solve for x
    x = 9,842,751,084.48/136,661.60
  6. Step 6: Final answer
    x = 72,022.80

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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.