Home / 68,860.36-103,271.64-18,928.72

Finding the Fourth Proportional to 68,860.36, 103,271.64 and 18,928.72

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Solution

The fourth proportional to 68,860.36, 103,271.64 and 18,928.72 is: 28,387.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,860.36 : 103,271.64 = 18,928.72 : x
  2. Step 2: Convert to fraction form
    68,860.36/103,271.64 = 18,928.72/x
  3. Step 3: Cross multiply
    68,860.36x = 103,271.64 × 18,928.72
  4. Step 4: Simplify right side
    68,860.36x = 1,954,799,957.50
  5. Step 5: Solve for x
    x = 1,954,799,957.50/68,860.36
  6. Step 6: Final answer
    x = 28,387.88

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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.