Home / 128,369.40-192,586.54-103,634.20

Finding the Fourth Proportional to 128,369.40, 192,586.54 and 103,634.20

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Solution

The fourth proportional to 128,369.40, 192,586.54 and 103,634.20 is: 155,477.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,369.40 : 192,586.54 = 103,634.20 : x
  2. Step 2: Convert to fraction form
    128,369.40/192,586.54 = 103,634.20/x
  3. Step 3: Cross multiply
    128,369.40x = 192,586.54 × 103,634.20
  4. Step 4: Simplify right side
    128,369.40x = 19,958,552,003.67
  5. Step 5: Solve for x
    x = 19,958,552,003.67/128,369.40
  6. Step 6: Final answer
    x = 155,477.49

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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.