Home / 128,290.13-192,466.57-90,413.30

Finding the Fourth Proportional to 128,290.13, 192,466.57 and 90,413.30

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Solution

The fourth proportional to 128,290.13, 192,466.57 and 90,413.30 is: 135,642.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,290.13 : 192,466.57 = 90,413.30 : x
  2. Step 2: Convert to fraction form
    128,290.13/192,466.57 = 90,413.30/x
  3. Step 3: Cross multiply
    128,290.13x = 192,466.57 × 90,413.30
  4. Step 4: Simplify right side
    128,290.13x = 17,401,538,158.04
  5. Step 5: Solve for x
    x = 17,401,538,158.04/128,290.13
  6. Step 6: Final answer
    x = 135,642.07

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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.