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Finding the Fourth Proportional to 66,980.49, 100,486.07 and 29,036.10

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Solution

The fourth proportional to 66,980.49, 100,486.07 and 29,036.10 is: 43,560.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,980.49 : 100,486.07 = 29,036.10 : x
  2. Step 2: Convert to fraction form
    66,980.49/100,486.07 = 29,036.10/x
  3. Step 3: Cross multiply
    66,980.49x = 100,486.07 × 29,036.10
  4. Step 4: Simplify right side
    66,980.49x = 2,917,723,431.95
  5. Step 5: Solve for x
    x = 2,917,723,431.95/66,980.49
  6. Step 6: Final answer
    x = 43,560.80

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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.