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Finding the Fourth Proportional to 45,412, 68,069.52 and 21,987.04

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Solution

The fourth proportional to 45,412, 68,069.52 and 21,987.04 is: 32,957.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,412 : 68,069.52 = 21,987.04 : x
  2. Step 2: Convert to fraction form
    45,412/68,069.52 = 21,987.04/x
  3. Step 3: Cross multiply
    45,412x = 68,069.52 × 21,987.04
  4. Step 4: Simplify right side
    45,412x = 1,496,647,259.02
  5. Step 5: Solve for x
    x = 1,496,647,259.02/45,412
  6. Step 6: Final answer
    x = 32,957.09

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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.