Home / 129,837.29-179,205.32-76,139.60

Finding the Fourth Proportional to 129,837.29, 179,205.32 and 76,139.60

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Solution

The fourth proportional to 129,837.29, 179,205.32 and 76,139.60 is: 105,090.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,837.29 : 179,205.32 = 76,139.60 : x
  2. Step 2: Convert to fraction form
    129,837.29/179,205.32 = 76,139.60/x
  3. Step 3: Cross multiply
    129,837.29x = 179,205.32 × 76,139.60
  4. Step 4: Simplify right side
    129,837.29x = 13,644,621,001.97
  5. Step 5: Solve for x
    x = 13,644,621,001.97/129,837.29
  6. Step 6: Final answer
    x = 105,090.16

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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.