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Finding the Fourth Proportional to 45,965.40, 68,978.88 and 19,676.58

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Solution

The fourth proportional to 45,965.40, 68,978.88 and 19,676.58 is: 29,528.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,965.40 : 68,978.88 = 19,676.58 : x
  2. Step 2: Convert to fraction form
    45,965.40/68,978.88 = 19,676.58/x
  3. Step 3: Cross multiply
    45,965.40x = 68,978.88 × 19,676.58
  4. Step 4: Simplify right side
    45,965.40x = 1,357,268,450.63
  5. Step 5: Solve for x
    x = 1,357,268,450.63/45,965.40
  6. Step 6: Final answer
    x = 29,528.05

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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.