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Finding the Fourth Proportional to 210,501.66, 315,903.75 and 84,069.43

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Solution

The fourth proportional to 210,501.66, 315,903.75 and 84,069.43 is: 126,164.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,501.66 : 315,903.75 = 84,069.43 : x
  2. Step 2: Convert to fraction form
    210,501.66/315,903.75 = 84,069.43/x
  3. Step 3: Cross multiply
    210,501.66x = 315,903.75 × 84,069.43
  4. Step 4: Simplify right side
    210,501.66x = 26,557,848,197.36
  5. Step 5: Solve for x
    x = 26,557,848,197.36/210,501.66
  6. Step 6: Final answer
    x = 126,164.55

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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.