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Finding the Fourth Proportional to 238,643.88, 329,328.82 and 131,215.72

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Solution

The fourth proportional to 238,643.88, 329,328.82 and 131,215.72 is: 181,077.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    238,643.88 : 329,328.82 = 131,215.72 : x
  2. Step 2: Convert to fraction form
    238,643.88/329,328.82 = 131,215.72/x
  3. Step 3: Cross multiply
    238,643.88x = 329,328.82 × 131,215.72
  4. Step 4: Simplify right side
    238,643.88x = 43,213,118,233.05
  5. Step 5: Solve for x
    x = 43,213,118,233.05/238,643.88
  6. Step 6: Final answer
    x = 181,077.84

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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.