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Finding the Fourth Proportional to 68,763.60, 103,145.40 and 39,239.10

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Solution

The fourth proportional to 68,763.60, 103,145.40 and 39,239.10 is: 58,858.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,763.60 : 103,145.40 = 39,239.10 : x
  2. Step 2: Convert to fraction form
    68,763.60/103,145.40 = 39,239.10/x
  3. Step 3: Cross multiply
    68,763.60x = 103,145.40 × 39,239.10
  4. Step 4: Simplify right side
    68,763.60x = 4,047,332,665.14
  5. Step 5: Solve for x
    x = 4,047,332,665.14/68,763.60
  6. Step 6: Final answer
    x = 58,858.65

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Similar ratio
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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.