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Finding the Fourth Proportional to 66,710.88, 99,980.40 and 49,939.56

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Solution

The fourth proportional to 66,710.88, 99,980.40 and 49,939.56 is: 74,845.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,710.88 : 99,980.40 = 49,939.56 : x
  2. Step 2: Convert to fraction form
    66,710.88/99,980.40 = 49,939.56/x
  3. Step 3: Cross multiply
    66,710.88x = 99,980.40 × 49,939.56
  4. Step 4: Simplify right side
    66,710.88x = 4,992,977,184.62
  5. Step 5: Solve for x
    x = 4,992,977,184.62/66,710.88
  6. Step 6: Final answer
    x = 74,845.02

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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.