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Finding the Fourth Proportional to 68,390.80, 102,528.60 and 35,558.80

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Solution

The fourth proportional to 68,390.80, 102,528.60 and 35,558.80 is: 53,308.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,390.80 : 102,528.60 = 35,558.80 : x
  2. Step 2: Convert to fraction form
    68,390.80/102,528.60 = 35,558.80/x
  3. Step 3: Cross multiply
    68,390.80x = 102,528.60 × 35,558.80
  4. Step 4: Simplify right side
    68,390.80x = 3,645,793,981.68
  5. Step 5: Solve for x
    x = 3,645,793,981.68/68,390.80
  6. Step 6: Final answer
    x = 53,308.25

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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.