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Finding the Fourth Proportional to 68,813.60, 103,220.40 and 37,709.60

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Solution

The fourth proportional to 68,813.60, 103,220.40 and 37,709.60 is: 56,564.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,813.60 : 103,220.40 = 37,709.60 : x
  2. Step 2: Convert to fraction form
    68,813.60/103,220.40 = 37,709.60/x
  3. Step 3: Cross multiply
    68,813.60x = 103,220.40 × 37,709.60
  4. Step 4: Simplify right side
    68,813.60x = 3,892,399,995.84
  5. Step 5: Solve for x
    x = 3,892,399,995.84/68,813.60
  6. Step 6: Final answer
    x = 56,564.40

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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.