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Finding the Fourth Proportional to 71,607.36, 98,821.44 and 39,775.20

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Solution

The fourth proportional to 71,607.36, 98,821.44 and 39,775.20 is: 54,891.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,607.36 : 98,821.44 = 39,775.20 : x
  2. Step 2: Convert to fraction form
    71,607.36/98,821.44 = 39,775.20/x
  3. Step 3: Cross multiply
    71,607.36x = 98,821.44 × 39,775.20
  4. Step 4: Simplify right side
    71,607.36x = 3,930,642,540.29
  5. Step 5: Solve for x
    x = 3,930,642,540.29/71,607.36
  6. Step 6: Final answer
    x = 54,891.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.