Home / 135,975.12-187,521.12-90,015.36

Finding the Fourth Proportional to 135,975.12, 187,521.12 and 90,015.36

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Solution

The fourth proportional to 135,975.12, 187,521.12 and 90,015.36 is: 124,138.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,975.12 : 187,521.12 = 90,015.36 : x
  2. Step 2: Convert to fraction form
    135,975.12/187,521.12 = 90,015.36/x
  3. Step 3: Cross multiply
    135,975.12x = 187,521.12 × 90,015.36
  4. Step 4: Simplify right side
    135,975.12x = 16,879,781,124.40
  5. Step 5: Solve for x
    x = 16,879,781,124.40/135,975.12
  6. Step 6: Final answer
    x = 124,138.75

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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.