Home / 100,579.68-138,975.12-82,661.04

Finding the Fourth Proportional to 100,579.68, 138,975.12 and 82,661.04

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Solution

The fourth proportional to 100,579.68, 138,975.12 and 82,661.04 is: 114,216.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,579.68 : 138,975.12 = 82,661.04 : x
  2. Step 2: Convert to fraction form
    100,579.68/138,975.12 = 82,661.04/x
  3. Step 3: Cross multiply
    100,579.68x = 138,975.12 × 82,661.04
  4. Step 4: Simplify right side
    100,579.68x = 11,487,827,953.32
  5. Step 5: Solve for x
    x = 11,487,827,953.32/100,579.68
  6. Step 6: Final answer
    x = 114,216.19

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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.