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Finding the Fourth Proportional to 68,290.64, 102,228.60 and 66,009.68

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Solution

The fourth proportional to 68,290.64, 102,228.60 and 66,009.68 is: 98,814.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,290.64 : 102,228.60 = 66,009.68 : x
  2. Step 2: Convert to fraction form
    68,290.64/102,228.60 = 66,009.68/x
  3. Step 3: Cross multiply
    68,290.64x = 102,228.60 × 66,009.68
  4. Step 4: Simplify right side
    68,290.64x = 6,748,077,172.85
  5. Step 5: Solve for x
    x = 6,748,077,172.85/68,290.64
  6. Step 6: Final answer
    x = 98,814.09

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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.