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Finding the Fourth Proportional to 45,722.80, 68,554.60 and 19,420.40

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Solution

The fourth proportional to 45,722.80, 68,554.60 and 19,420.40 is: 29,118.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,722.80 : 68,554.60 = 19,420.40 : x
  2. Step 2: Convert to fraction form
    45,722.80/68,554.60 = 19,420.40/x
  3. Step 3: Cross multiply
    45,722.80x = 68,554.60 × 19,420.40
  4. Step 4: Simplify right side
    45,722.80x = 1,331,357,753.84
  5. Step 5: Solve for x
    x = 1,331,357,753.84/45,722.80
  6. Step 6: Final answer
    x = 29,118.03

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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.