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Finding the Fourth Proportional to 66,642.82, 99,878.11 and 49,871.26

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Solution

The fourth proportional to 66,642.82, 99,878.11 and 49,871.26 is: 74,742.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,642.82 : 99,878.11 = 49,871.26 : x
  2. Step 2: Convert to fraction form
    66,642.82/99,878.11 = 49,871.26/x
  3. Step 3: Cross multiply
    66,642.82x = 99,878.11 × 49,871.26
  4. Step 4: Simplify right side
    66,642.82x = 4,981,047,192.12
  5. Step 5: Solve for x
    x = 4,981,047,192.12/66,642.82
  6. Step 6: Final answer
    x = 74,742.45

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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.