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Finding the Fourth Proportional to 68,751.40, 103,028.70 and 39,106.60

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Solution

The fourth proportional to 68,751.40, 103,028.70 and 39,106.60 is: 58,603.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,751.40 : 103,028.70 = 39,106.60 : x
  2. Step 2: Convert to fraction form
    68,751.40/103,028.70 = 39,106.60/x
  3. Step 3: Cross multiply
    68,751.40x = 103,028.70 × 39,106.60
  4. Step 4: Simplify right side
    68,751.40x = 4,029,102,159.42
  5. Step 5: Solve for x
    x = 4,029,102,159.42/68,751.40
  6. Step 6: Final answer
    x = 58,603.93

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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.