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Finding the Fourth Proportional to 68,486.90, 102,738.54 and 29,038.88

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Solution

The fourth proportional to 68,486.90, 102,738.54 and 29,038.88 is: 43,561.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,486.90 : 102,738.54 = 29,038.88 : x
  2. Step 2: Convert to fraction form
    68,486.90/102,738.54 = 29,038.88/x
  3. Step 3: Cross multiply
    68,486.90x = 102,738.54 × 29,038.88
  4. Step 4: Simplify right side
    68,486.90x = 2,983,411,620.74
  5. Step 5: Solve for x
    x = 2,983,411,620.74/68,486.90
  6. Step 6: Final answer
    x = 43,561.79

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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.