Home / 129,639.30-178,984.80-105,822.60

Finding the Fourth Proportional to 129,639.30, 178,984.80 and 105,822.60

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Solution

The fourth proportional to 129,639.30, 178,984.80 and 105,822.60 is: 146,102.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,639.30 : 178,984.80 = 105,822.60 : x
  2. Step 2: Convert to fraction form
    129,639.30/178,984.80 = 105,822.60/x
  3. Step 3: Cross multiply
    129,639.30x = 178,984.80 × 105,822.60
  4. Step 4: Simplify right side
    129,639.30x = 18,940,636,896.48
  5. Step 5: Solve for x
    x = 18,940,636,896.48/129,639.30
  6. Step 6: Final answer
    x = 146,102.59

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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.