Home / 129,285.64-178,371.30-105,371.20

Finding the Fourth Proportional to 129,285.64, 178,371.30 and 105,371.20

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Solution

The fourth proportional to 129,285.64, 178,371.30 and 105,371.20 is: 145,377.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,285.64 : 178,371.30 = 105,371.20 : x
  2. Step 2: Convert to fraction form
    129,285.64/178,371.30 = 105,371.20/x
  3. Step 3: Cross multiply
    129,285.64x = 178,371.30 × 105,371.20
  4. Step 4: Simplify right side
    129,285.64x = 18,795,197,926.56
  5. Step 5: Solve for x
    x = 18,795,197,926.56/129,285.64
  6. Step 6: Final answer
    x = 145,377.31

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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.