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Finding the Fourth Proportional to 142,683.78, 196,724.52 and 91,606.26

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Solution

The fourth proportional to 142,683.78, 196,724.52 and 91,606.26 is: 126,301.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,683.78 : 196,724.52 = 91,606.26 : x
  2. Step 2: Convert to fraction form
    142,683.78/196,724.52 = 91,606.26/x
  3. Step 3: Cross multiply
    142,683.78x = 196,724.52 × 91,606.26
  4. Step 4: Simplify right side
    142,683.78x = 18,021,197,527.50
  5. Step 5: Solve for x
    x = 18,021,197,527.50/142,683.78
  6. Step 6: Final answer
    x = 126,301.65

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.