Home / 128,486.03-192,727.96-100,429.69

Finding the Fourth Proportional to 128,486.03, 192,727.96 and 100,429.69

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Solution

The fourth proportional to 128,486.03, 192,727.96 and 100,429.69 is: 150,643.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,486.03 : 192,727.96 = 100,429.69 : x
  2. Step 2: Convert to fraction form
    128,486.03/192,727.96 = 100,429.69/x
  3. Step 3: Cross multiply
    128,486.03x = 192,727.96 × 100,429.69
  4. Step 4: Simplify right side
    128,486.03x = 19,355,609,277.13
  5. Step 5: Solve for x
    x = 19,355,609,277.13/128,486.03
  6. Step 6: Final answer
    x = 150,643.69

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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.