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Finding the Fourth Proportional to 128,135.88, 192,222.24 and 39,396.84

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Solution

The fourth proportional to 128,135.88, 192,222.24 and 39,396.84 is: 59,100.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,135.88 : 192,222.24 = 39,396.84 : x
  2. Step 2: Convert to fraction form
    128,135.88/192,222.24 = 39,396.84/x
  3. Step 3: Cross multiply
    128,135.88x = 192,222.24 × 39,396.84
  4. Step 4: Simplify right side
    128,135.88x = 7,572,948,833.72
  5. Step 5: Solve for x
    x = 7,572,948,833.72/128,135.88
  6. Step 6: Final answer
    x = 59,100.92

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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.