Home / 100,631.41-138,871.64-55,314.04

Finding the Fourth Proportional to 100,631.41, 138,871.64 and 55,314.04

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Solution

The fourth proportional to 100,631.41, 138,871.64 and 55,314.04 is: 76,333.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,631.41 : 138,871.64 = 55,314.04 : x
  2. Step 2: Convert to fraction form
    100,631.41/138,871.64 = 55,314.04/x
  3. Step 3: Cross multiply
    100,631.41x = 138,871.64 × 55,314.04
  4. Step 4: Simplify right side
    100,631.41x = 7,681,551,449.83
  5. Step 5: Solve for x
    x = 7,681,551,449.83/100,631.41
  6. Step 6: Final answer
    x = 76,333.54

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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.