Home / 129,828.79-179,258.63-83,915.61

Finding the Fourth Proportional to 129,828.79, 179,258.63 and 83,915.61

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Solution

The fourth proportional to 129,828.79, 179,258.63 and 83,915.61 is: 115,864.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,828.79 : 179,258.63 = 83,915.61 : x
  2. Step 2: Convert to fraction form
    129,828.79/179,258.63 = 83,915.61/x
  3. Step 3: Cross multiply
    129,828.79x = 179,258.63 × 83,915.61
  4. Step 4: Simplify right side
    129,828.79x = 15,042,597,284.21
  5. Step 5: Solve for x
    x = 15,042,597,284.21/129,828.79
  6. Step 6: Final answer
    x = 115,864.88

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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.