Home / 100,413.54-138,572.09-55,090.69

Finding the Fourth Proportional to 100,413.54, 138,572.09 and 55,090.69

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Solution

The fourth proportional to 100,413.54, 138,572.09 and 55,090.69 is: 76,025.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,413.54 : 138,572.09 = 55,090.69 : x
  2. Step 2: Convert to fraction form
    100,413.54/138,572.09 = 55,090.69/x
  3. Step 3: Cross multiply
    100,413.54x = 138,572.09 × 55,090.69
  4. Step 4: Simplify right side
    100,413.54x = 7,634,032,052.84
  5. Step 5: Solve for x
    x = 7,634,032,052.84/100,413.54
  6. Step 6: Final answer
    x = 76,025.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.