Home / 129,915.77-179,162.08-86,231.05

Finding the Fourth Proportional to 129,915.77, 179,162.08 and 86,231.05

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Solution

The fourth proportional to 129,915.77, 179,162.08 and 86,231.05 is: 118,918.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,915.77 : 179,162.08 = 86,231.05 : x
  2. Step 2: Convert to fraction form
    129,915.77/179,162.08 = 86,231.05/x
  3. Step 3: Cross multiply
    129,915.77x = 179,162.08 × 86,231.05
  4. Step 4: Simplify right side
    129,915.77x = 15,449,333,615.10
  5. Step 5: Solve for x
    x = 15,449,333,615.10/129,915.77
  6. Step 6: Final answer
    x = 118,918.08

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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.