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Finding the Fourth Proportional to 210,670.49, 315,940.12 and 70,396.31

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Solution

The fourth proportional to 210,670.49, 315,940.12 and 70,396.31 is: 105,572.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,670.49 : 315,940.12 = 70,396.31 : x
  2. Step 2: Convert to fraction form
    210,670.49/315,940.12 = 70,396.31/x
  3. Step 3: Cross multiply
    210,670.49x = 315,940.12 × 70,396.31
  4. Step 4: Simplify right side
    210,670.49x = 22,241,019,242.82
  5. Step 5: Solve for x
    x = 22,241,019,242.82/210,670.49
  6. Step 6: Final answer
    x = 105,572.54

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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.