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Finding the Fourth Proportional to 68,693.46, 103,054.97 and 21,307.60

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Solution

The fourth proportional to 68,693.46, 103,054.97 and 21,307.60 is: 31,965.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,693.46 : 103,054.97 = 21,307.60 : x
  2. Step 2: Convert to fraction form
    68,693.46/103,054.97 = 21,307.60/x
  3. Step 3: Cross multiply
    68,693.46x = 103,054.97 × 21,307.60
  4. Step 4: Simplify right side
    68,693.46x = 2,195,854,078.77
  5. Step 5: Solve for x
    x = 2,195,854,078.77/68,693.46
  6. Step 6: Final answer
    x = 31,965.98

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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.