Home / 129,359.90-178,516.41-72,771.32

Finding the Fourth Proportional to 129,359.90, 178,516.41 and 72,771.32

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Solution

The fourth proportional to 129,359.90, 178,516.41 and 72,771.32 is: 100,424.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,359.90 : 178,516.41 = 72,771.32 : x
  2. Step 2: Convert to fraction form
    129,359.90/178,516.41 = 72,771.32/x
  3. Step 3: Cross multiply
    129,359.90x = 178,516.41 × 72,771.32
  4. Step 4: Simplify right side
    129,359.90x = 12,990,874,797.36
  5. Step 5: Solve for x
    x = 12,990,874,797.36/129,359.90
  6. Step 6: Final answer
    x = 100,424.28

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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.