Home / 129,132.36-178,186.08-75,378.48

Finding the Fourth Proportional to 129,132.36, 178,186.08 and 75,378.48

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Solution

The fourth proportional to 129,132.36, 178,186.08 and 75,378.48 is: 104,012.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,132.36 : 178,186.08 = 75,378.48 : x
  2. Step 2: Convert to fraction form
    129,132.36/178,186.08 = 75,378.48/x
  3. Step 3: Cross multiply
    129,132.36x = 178,186.08 × 75,378.48
  4. Step 4: Simplify right side
    129,132.36x = 13,431,395,867.56
  5. Step 5: Solve for x
    x = 13,431,395,867.56/129,132.36
  6. Step 6: Final answer
    x = 104,012.63

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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.