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Finding the Fourth Proportional to 68,878.78, 103,219.59 and 39,235.39

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Solution

The fourth proportional to 68,878.78, 103,219.59 and 39,235.39 is: 58,796.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,878.78 : 103,219.59 = 39,235.39 : x
  2. Step 2: Convert to fraction form
    68,878.78/103,219.59 = 39,235.39/x
  3. Step 3: Cross multiply
    68,878.78x = 103,219.59 × 39,235.39
  4. Step 4: Simplify right side
    68,878.78x = 4,049,860,869.29
  5. Step 5: Solve for x
    x = 4,049,860,869.29/68,878.78
  6. Step 6: Final answer
    x = 58,796.93

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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.