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Finding the Fourth Proportional to 67,368.40, 100,856.78 and 39,202.60

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Solution

The fourth proportional to 67,368.40, 100,856.78 and 39,202.60 is: 58,689.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,368.40 : 100,856.78 = 39,202.60 : x
  2. Step 2: Convert to fraction form
    67,368.40/100,856.78 = 39,202.60/x
  3. Step 3: Cross multiply
    67,368.40x = 100,856.78 × 39,202.60
  4. Step 4: Simplify right side
    67,368.40x = 3,953,848,003.63
  5. Step 5: Solve for x
    x = 3,953,848,003.63/67,368.40
  6. Step 6: Final answer
    x = 58,689.95

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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.