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Finding the Fourth Proportional to 68,304.32, 101,922.21 and 61,212.05

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Solution

The fourth proportional to 68,304.32, 101,922.21 and 61,212.05 is: 91,339.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,304.32 : 101,922.21 = 61,212.05 : x
  2. Step 2: Convert to fraction form
    68,304.32/101,922.21 = 61,212.05/x
  3. Step 3: Cross multiply
    68,304.32x = 101,922.21 × 61,212.05
  4. Step 4: Simplify right side
    68,304.32x = 6,238,866,905.02
  5. Step 5: Solve for x
    x = 6,238,866,905.02/68,304.32
  6. Step 6: Final answer
    x = 91,339.28

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.