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Finding the Fourth Proportional to 128,015.60, 192,023.40 and 65,646.32

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Solution

The fourth proportional to 128,015.60, 192,023.40 and 65,646.32 is: 98,469.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,015.60 : 192,023.40 = 65,646.32 : x
  2. Step 2: Convert to fraction form
    128,015.60/192,023.40 = 65,646.32/x
  3. Step 3: Cross multiply
    128,015.60x = 192,023.40 × 65,646.32
  4. Step 4: Simplify right side
    128,015.60x = 12,605,629,563.89
  5. Step 5: Solve for x
    x = 12,605,629,563.89/128,015.60
  6. Step 6: Final answer
    x = 98,469.48

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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.