Home / 68,681.64-103,021.45-18,761.65

Finding the Fourth Proportional to 68,681.64, 103,021.45 and 18,761.65

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Solution

The fourth proportional to 68,681.64, 103,021.45 and 18,761.65 is: 28,142.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,681.64 : 103,021.45 = 18,761.65 : x
  2. Step 2: Convert to fraction form
    68,681.64/103,021.45 = 18,761.65/x
  3. Step 3: Cross multiply
    68,681.64x = 103,021.45 × 18,761.65
  4. Step 4: Simplify right side
    68,681.64x = 1,932,852,387.39
  5. Step 5: Solve for x
    x = 1,932,852,387.39/68,681.64
  6. Step 6: Final answer
    x = 28,142.20

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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.