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Finding the Fourth Proportional to 210,630.83, 315,975.83 and 68,430.47

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Solution

The fourth proportional to 210,630.83, 315,975.83 and 68,430.47 is: 102,655.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,630.83 : 315,975.83 = 68,430.47 : x
  2. Step 2: Convert to fraction form
    210,630.83/315,975.83 = 68,430.47/x
  3. Step 3: Cross multiply
    210,630.83x = 315,975.83 × 68,430.47
  4. Step 4: Simplify right side
    210,630.83x = 21,622,372,633.51
  5. Step 5: Solve for x
    x = 21,622,372,633.51/210,630.83
  6. Step 6: Final answer
    x = 102,655.31

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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.