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Finding the Fourth Proportional to 68,886.40, 103,231.20 and 39,241.60

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Solution

The fourth proportional to 68,886.40, 103,231.20 and 39,241.60 is: 58,806.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,886.40 : 103,231.20 = 39,241.60 : x
  2. Step 2: Convert to fraction form
    68,886.40/103,231.20 = 39,241.60/x
  3. Step 3: Cross multiply
    68,886.40x = 103,231.20 × 39,241.60
  4. Step 4: Simplify right side
    68,886.40x = 4,050,957,457.92
  5. Step 5: Solve for x
    x = 4,050,957,457.92/68,886.40
  6. Step 6: Final answer
    x = 58,806.35

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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.