Home / 129,698.07-178,986.08-73,109.43

Finding the Fourth Proportional to 129,698.07, 178,986.08 and 73,109.43

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Solution

The fourth proportional to 129,698.07, 178,986.08 and 73,109.43 is: 100,892.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,698.07 : 178,986.08 = 73,109.43 : x
  2. Step 2: Convert to fraction form
    129,698.07/178,986.08 = 73,109.43/x
  3. Step 3: Cross multiply
    129,698.07x = 178,986.08 × 73,109.43
  4. Step 4: Simplify right side
    129,698.07x = 13,085,569,921.19
  5. Step 5: Solve for x
    x = 13,085,569,921.19/129,698.07
  6. Step 6: Final answer
    x = 100,892.56

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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.