Home / 100,690.62-138,956.55-55,370.46

Finding the Fourth Proportional to 100,690.62, 138,956.55 and 55,370.46

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Solution

The fourth proportional to 100,690.62, 138,956.55 and 55,370.46 is: 76,413.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,690.62 : 138,956.55 = 55,370.46 : x
  2. Step 2: Convert to fraction form
    100,690.62/138,956.55 = 55,370.46/x
  3. Step 3: Cross multiply
    100,690.62x = 138,956.55 × 55,370.46
  4. Step 4: Simplify right side
    100,690.62x = 7,694,088,093.51
  5. Step 5: Solve for x
    x = 7,694,088,093.51/100,690.62
  6. Step 6: Final answer
    x = 76,413.16

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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.