Home / 210,544.20-315,816.30-105,325.20

Finding the Fourth Proportional to 210,544.20, 315,816.30 and 105,325.20

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Solution

The fourth proportional to 210,544.20, 315,816.30 and 105,325.20 is: 157,987.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,544.20 : 315,816.30 = 105,325.20 : x
  2. Step 2: Convert to fraction form
    210,544.20/315,816.30 = 105,325.20/x
  3. Step 3: Cross multiply
    210,544.20x = 315,816.30 × 105,325.20
  4. Step 4: Simplify right side
    210,544.20x = 33,263,414,960.76
  5. Step 5: Solve for x
    x = 33,263,414,960.76/210,544.20
  6. Step 6: Final answer
    x = 157,987.80

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1.5x scale

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.