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Finding the Fourth Proportional to 68,756.40, 103,164.00 and 28,784.72

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Solution

The fourth proportional to 68,756.40, 103,164.00 and 28,784.72 is: 43,189.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,756.40 : 103,164.00 = 28,784.72 : x
  2. Step 2: Convert to fraction form
    68,756.40/103,164.00 = 28,784.72/x
  3. Step 3: Cross multiply
    68,756.40x = 103,164.00 × 28,784.72
  4. Step 4: Simplify right side
    68,756.40x = 2,969,546,962.02
  5. Step 5: Solve for x
    x = 2,969,546,962.02/68,756.40
  6. Step 6: Final answer
    x = 43,189.39

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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.