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Finding the Fourth Proportional to 68,800.51, 103,200.86 and 18,881.29

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Solution

The fourth proportional to 68,800.51, 103,200.86 and 18,881.29 is: 28,321.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,800.51 : 103,200.86 = 18,881.29 : x
  2. Step 2: Convert to fraction form
    68,800.51/103,200.86 = 18,881.29/x
  3. Step 3: Cross multiply
    68,800.51x = 103,200.86 × 18,881.29
  4. Step 4: Simplify right side
    68,800.51x = 1,948,565,271.50
  5. Step 5: Solve for x
    x = 1,948,565,271.50/68,800.51
  6. Step 6: Final answer
    x = 28,321.96

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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.