Home / 129,361.25-178,491.60-75,635.84

Finding the Fourth Proportional to 129,361.25, 178,491.60 and 75,635.84

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Solution

The fourth proportional to 129,361.25, 178,491.60 and 75,635.84 is: 104,361.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,361.25 : 178,491.60 = 75,635.84 : x
  2. Step 2: Convert to fraction form
    129,361.25/178,491.60 = 75,635.84/x
  3. Step 3: Cross multiply
    129,361.25x = 178,491.60 × 75,635.84
  4. Step 4: Simplify right side
    129,361.25x = 13,500,362,545.17
  5. Step 5: Solve for x
    x = 13,500,362,545.17/129,361.25
  6. Step 6: Final answer
    x = 104,361.72

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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.