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Finding the Fourth Proportional to 140,190.89, 210,129.59 and 73,638.05

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Solution

The fourth proportional to 140,190.89, 210,129.59 and 73,638.05 is: 110,374.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,190.89 : 210,129.59 = 73,638.05 : x
  2. Step 2: Convert to fraction form
    140,190.89/210,129.59 = 73,638.05/x
  3. Step 3: Cross multiply
    140,190.89x = 210,129.59 × 73,638.05
  4. Step 4: Simplify right side
    140,190.89x = 15,473,531,836.06
  5. Step 5: Solve for x
    x = 15,473,531,836.06/140,190.89
  6. Step 6: Final answer
    x = 110,374.74

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.