Home / 129,634.30-178,977.90-105,817.60

Finding the Fourth Proportional to 129,634.30, 178,977.90 and 105,817.60

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Solution

The fourth proportional to 129,634.30, 178,977.90 and 105,817.60 is: 146,095.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,634.30 : 178,977.90 = 105,817.60 : x
  2. Step 2: Convert to fraction form
    129,634.30/178,977.90 = 105,817.60/x
  3. Step 3: Cross multiply
    129,634.30x = 178,977.90 × 105,817.60
  4. Step 4: Simplify right side
    129,634.30x = 18,939,011,831.04
  5. Step 5: Solve for x
    x = 18,939,011,831.04/129,634.30
  6. Step 6: Final answer
    x = 146,095.68

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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.