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Finding the Fourth Proportional to 68,798.51, 103,186.69 and 18,867.02

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Solution

The fourth proportional to 68,798.51, 103,186.69 and 18,867.02 is: 28,297.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,798.51 : 103,186.69 = 18,867.02 : x
  2. Step 2: Convert to fraction form
    68,798.51/103,186.69 = 18,867.02/x
  3. Step 3: Cross multiply
    68,798.51x = 103,186.69 × 18,867.02
  4. Step 4: Simplify right side
    68,798.51x = 1,946,824,780.86
  5. Step 5: Solve for x
    x = 1,946,824,780.86/68,798.51
  6. Step 6: Final answer
    x = 28,297.49

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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.