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Finding the Fourth Proportional to 68,671.60, 103,072.20 and 42,427.60

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Solution

The fourth proportional to 68,671.60, 103,072.20 and 42,427.60 is: 63,681.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,671.60 : 103,072.20 = 42,427.60 : x
  2. Step 2: Convert to fraction form
    68,671.60/103,072.20 = 42,427.60/x
  3. Step 3: Cross multiply
    68,671.60x = 103,072.20 × 42,427.60
  4. Step 4: Simplify right side
    68,671.60x = 4,373,106,072.72
  5. Step 5: Solve for x
    x = 4,373,106,072.72/68,671.60
  6. Step 6: Final answer
    x = 63,681.44

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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.