Home / 210,619.30-315,930.30-84,270.10

Finding the Fourth Proportional to 210,619.30, 315,930.30 and 84,270.10

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Solution

The fourth proportional to 210,619.30, 315,930.30 and 84,270.10 is: 126,405.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,619.30 : 315,930.30 = 84,270.10 : x
  2. Step 2: Convert to fraction form
    210,619.30/315,930.30 = 84,270.10/x
  3. Step 3: Cross multiply
    210,619.30x = 315,930.30 × 84,270.10
  4. Step 4: Simplify right side
    210,619.30x = 26,623,477,974.03
  5. Step 5: Solve for x
    x = 26,623,477,974.03/210,619.30
  6. Step 6: Final answer
    x = 126,405.69

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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.