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Finding the Fourth Proportional to 45,368.89, 68,008.98 and 20,415.22

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Solution

The fourth proportional to 45,368.89, 68,008.98 and 20,415.22 is: 30,602.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,368.89 : 68,008.98 = 20,415.22 : x
  2. Step 2: Convert to fraction form
    45,368.89/68,008.98 = 20,415.22/x
  3. Step 3: Cross multiply
    45,368.89x = 68,008.98 × 20,415.22
  4. Step 4: Simplify right side
    45,368.89x = 1,388,418,288.68
  5. Step 5: Solve for x
    x = 1,388,418,288.68/45,368.89
  6. Step 6: Final answer
    x = 30,602.87

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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.