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Finding the Fourth Proportional to 68,486.30, 102,664.65 and 40,427.90

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Solution

The fourth proportional to 68,486.30, 102,664.65 and 40,427.90 is: 60,603.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,486.30 : 102,664.65 = 40,427.90 : x
  2. Step 2: Convert to fraction form
    68,486.30/102,664.65 = 40,427.90/x
  3. Step 3: Cross multiply
    68,486.30x = 102,664.65 × 40,427.90
  4. Step 4: Simplify right side
    68,486.30x = 4,150,516,203.74
  5. Step 5: Solve for x
    x = 4,150,516,203.74/68,486.30
  6. Step 6: Final answer
    x = 60,603.60

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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.