Home / 66,564.20-99,860.70-19,821.80

Finding the Fourth Proportional to 66,564.20, 99,860.70 and 19,821.80

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Solution

The fourth proportional to 66,564.20, 99,860.70 and 19,821.80 is: 29,736.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,564.20 : 99,860.70 = 19,821.80 : x
  2. Step 2: Convert to fraction form
    66,564.20/99,860.70 = 19,821.80/x
  3. Step 3: Cross multiply
    66,564.20x = 99,860.70 × 19,821.80
  4. Step 4: Simplify right side
    66,564.20x = 1,979,418,823.26
  5. Step 5: Solve for x
    x = 1,979,418,823.26/66,564.20
  6. Step 6: Final answer
    x = 29,736.99

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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.