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Finding the Fourth Proportional to 48,912.31, 67,239.11 and 42,081.22

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Solution

The fourth proportional to 48,912.31, 67,239.11 and 42,081.22 is: 57,848.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,912.31 : 67,239.11 = 42,081.22 : x
  2. Step 2: Convert to fraction form
    48,912.31/67,239.11 = 42,081.22/x
  3. Step 3: Cross multiply
    48,912.31x = 67,239.11 × 42,081.22
  4. Step 4: Simplify right side
    48,912.31x = 2,829,503,780.51
  5. Step 5: Solve for x
    x = 2,829,503,780.51/48,912.31
  6. Step 6: Final answer
    x = 57,848.50

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.