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Finding the Fourth Proportional to 66,479.13, 91,742.09 and 39,637.22

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Solution

The fourth proportional to 66,479.13, 91,742.09 and 39,637.22 is: 54,699.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,479.13 : 91,742.09 = 39,637.22 : x
  2. Step 2: Convert to fraction form
    66,479.13/91,742.09 = 39,637.22/x
  3. Step 3: Cross multiply
    66,479.13x = 91,742.09 × 39,637.22
  4. Step 4: Simplify right side
    66,479.13x = 3,636,400,747.69
  5. Step 5: Solve for x
    x = 3,636,400,747.69/66,479.13
  6. Step 6: Final answer
    x = 54,699.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.