Home / 210,505.16-315,982.52-90,621.45

Finding the Fourth Proportional to 210,505.16, 315,982.52 and 90,621.45

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Solution

The fourth proportional to 210,505.16, 315,982.52 and 90,621.45 is: 136,028.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,505.16 : 315,982.52 = 90,621.45 : x
  2. Step 2: Convert to fraction form
    210,505.16/315,982.52 = 90,621.45/x
  3. Step 3: Cross multiply
    210,505.16x = 315,982.52 × 90,621.45
  4. Step 4: Simplify right side
    210,505.16x = 28,634,794,137.05
  5. Step 5: Solve for x
    x = 28,634,794,137.05/210,505.16
  6. Step 6: Final answer
    x = 136,028.94

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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.