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Finding the Fourth Proportional to 135,661.88, 187,213.39 and 76,045.88

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Solution

The fourth proportional to 135,661.88, 187,213.39 and 76,045.88 is: 104,943.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,661.88 : 187,213.39 = 76,045.88 : x
  2. Step 2: Convert to fraction form
    135,661.88/187,213.39 = 76,045.88/x
  3. Step 3: Cross multiply
    135,661.88x = 187,213.39 × 76,045.88
  4. Step 4: Simplify right side
    135,661.88x = 14,236,805,864.15
  5. Step 5: Solve for x
    x = 14,236,805,864.15/135,661.88
  6. Step 6: Final answer
    x = 104,943.31

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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.