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Finding the Fourth Proportional to 231,004.98, 318,783.42 and 129,032.28

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Solution

The fourth proportional to 231,004.98, 318,783.42 and 129,032.28 is: 178,062.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,004.98 : 318,783.42 = 129,032.28 : x
  2. Step 2: Convert to fraction form
    231,004.98/318,783.42 = 129,032.28/x
  3. Step 3: Cross multiply
    231,004.98x = 318,783.42 × 129,032.28
  4. Step 4: Simplify right side
    231,004.98x = 41,133,351,508.80
  5. Step 5: Solve for x
    x = 41,133,351,508.80/231,004.98
  6. Step 6: Final answer
    x = 178,062.62

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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.