Home / 129,384.40-178,544.64-78,396.52

Finding the Fourth Proportional to 129,384.40, 178,544.64 and 78,396.52

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Solution

The fourth proportional to 129,384.40, 178,544.64 and 78,396.52 is: 108,183.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,384.40 : 178,544.64 = 78,396.52 : x
  2. Step 2: Convert to fraction form
    129,384.40/178,544.64 = 78,396.52/x
  3. Step 3: Cross multiply
    129,384.40x = 178,544.64 × 78,396.52
  4. Step 4: Simplify right side
    129,384.40x = 13,997,278,440.65
  5. Step 5: Solve for x
    x = 13,997,278,440.65/129,384.40
  6. Step 6: Final answer
    x = 108,183.66

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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.