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Finding the Fourth Proportional to 231,813.48, 319,881.08 and 131,211.48

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Solution

The fourth proportional to 231,813.48, 319,881.08 and 131,211.48 is: 181,059.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,813.48 : 319,881.08 = 131,211.48 : x
  2. Step 2: Convert to fraction form
    231,813.48/319,881.08 = 131,211.48/x
  3. Step 3: Cross multiply
    231,813.48x = 319,881.08 × 131,211.48
  4. Step 4: Simplify right side
    231,813.48x = 41,972,069,930.80
  5. Step 5: Solve for x
    x = 41,972,069,930.80/231,813.48
  6. Step 6: Final answer
    x = 181,059.66

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1.5x scale

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.