Home / 128,290.15-192,466.61-90,413.32

Finding the Fourth Proportional to 128,290.15, 192,466.61 and 90,413.32

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Solution

The fourth proportional to 128,290.15, 192,466.61 and 90,413.32 is: 135,642.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,290.15 : 192,466.61 = 90,413.32 : x
  2. Step 2: Convert to fraction form
    128,290.15/192,466.61 = 90,413.32/x
  3. Step 3: Cross multiply
    128,290.15x = 192,466.61 × 90,413.32
  4. Step 4: Simplify right side
    128,290.15x = 17,401,544,266.01
  5. Step 5: Solve for x
    x = 17,401,544,266.01/128,290.15
  6. Step 6: Final answer
    x = 135,642.09

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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.