Home / 128,125.41-192,078.77-90,567.33

Finding the Fourth Proportional to 128,125.41, 192,078.77 and 90,567.33

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Solution

The fourth proportional to 128,125.41, 192,078.77 and 90,567.33 is: 135,773.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,125.41 : 192,078.77 = 90,567.33 : x
  2. Step 2: Convert to fraction form
    128,125.41/192,078.77 = 90,567.33/x
  3. Step 3: Cross multiply
    128,125.41x = 192,078.77 × 90,567.33
  4. Step 4: Simplify right side
    128,125.41x = 17,396,060,895.75
  5. Step 5: Solve for x
    x = 17,396,060,895.75/128,125.41
  6. Step 6: Final answer
    x = 135,773.70

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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.