Home / 210,112.60-315,212.10-69,971.80

Finding the Fourth Proportional to 210,112.60, 315,212.10 and 69,971.80

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Solution

The fourth proportional to 210,112.60, 315,212.10 and 69,971.80 is: 104,972.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,112.60 : 315,212.10 = 69,971.80 : x
  2. Step 2: Convert to fraction form
    210,112.60/315,212.10 = 69,971.80/x
  3. Step 3: Cross multiply
    210,112.60x = 315,212.10 × 69,971.80
  4. Step 4: Simplify right side
    210,112.60x = 22,055,958,018.78
  5. Step 5: Solve for x
    x = 22,055,958,018.78/210,112.60
  6. Step 6: Final answer
    x = 104,972.09

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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.