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Finding the Fourth Proportional to 68,890.40, 103,237.20 and 39,245.60

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Solution

The fourth proportional to 68,890.40, 103,237.20 and 39,245.60 is: 58,812.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,890.40 : 103,237.20 = 39,245.60 : x
  2. Step 2: Convert to fraction form
    68,890.40/103,237.20 = 39,245.60/x
  3. Step 3: Cross multiply
    68,890.40x = 103,237.20 × 39,245.60
  4. Step 4: Simplify right side
    68,890.40x = 4,051,605,856.32
  5. Step 5: Solve for x
    x = 4,051,605,856.32/68,890.40
  6. Step 6: Final answer
    x = 58,812.34

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1.5x scale

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.