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Finding the Fourth Proportional to 231,618.31, 319,606.41 and 129,649.48

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Solution

The fourth proportional to 231,618.31, 319,606.41 and 129,649.48 is: 178,901.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,618.31 : 319,606.41 = 129,649.48 : x
  2. Step 2: Convert to fraction form
    231,618.31/319,606.41 = 129,649.48/x
  3. Step 3: Cross multiply
    231,618.31x = 319,606.41 × 129,649.48
  4. Step 4: Simplify right side
    231,618.31x = 41,436,804,861.17
  5. Step 5: Solve for x
    x = 41,436,804,861.17/231,618.31
  6. Step 6: Final answer
    x = 178,901.25

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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.