Home / 100,494.21-138,681.42-55,172.94

Finding the Fourth Proportional to 100,494.21, 138,681.42 and 55,172.94

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Solution

The fourth proportional to 100,494.21, 138,681.42 and 55,172.94 is: 76,138.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,494.21 : 138,681.42 = 55,172.94 : x
  2. Step 2: Convert to fraction form
    100,494.21/138,681.42 = 55,172.94/x
  3. Step 3: Cross multiply
    100,494.21x = 138,681.42 × 55,172.94
  4. Step 4: Simplify right side
    100,494.21x = 7,651,461,664.77
  5. Step 5: Solve for x
    x = 7,651,461,664.77/100,494.21
  6. Step 6: Final answer
    x = 76,138.33

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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.