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Finding the Fourth Proportional to 128,015.72, 192,023.60 and 34,521.48

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Solution

The fourth proportional to 128,015.72, 192,023.60 and 34,521.48 is: 51,782.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,015.72 : 192,023.60 = 34,521.48 : x
  2. Step 2: Convert to fraction form
    128,015.72/192,023.60 = 34,521.48/x
  3. Step 3: Cross multiply
    128,015.72x = 192,023.60 × 34,521.48
  4. Step 4: Simplify right side
    128,015.72x = 6,628,938,866.93
  5. Step 5: Solve for x
    x = 6,628,938,866.93/128,015.72
  6. Step 6: Final answer
    x = 51,782.23

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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.