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Finding the Fourth Proportional to 68,434.60, 102,716.70 and 42,190.60

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Solution

The fourth proportional to 68,434.60, 102,716.70 and 42,190.60 is: 63,325.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,434.60 : 102,716.70 = 42,190.60 : x
  2. Step 2: Convert to fraction form
    68,434.60/102,716.70 = 42,190.60/x
  3. Step 3: Cross multiply
    68,434.60x = 102,716.70 × 42,190.60
  4. Step 4: Simplify right side
    68,434.60x = 4,333,679,203.02
  5. Step 5: Solve for x
    x = 4,333,679,203.02/68,434.60
  6. Step 6: Final answer
    x = 63,325.85

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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.