Home / 129,225.44-178,256.72-80,743.28

Finding the Fourth Proportional to 129,225.44, 178,256.72 and 80,743.28

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Solution

The fourth proportional to 129,225.44, 178,256.72 and 80,743.28 is: 111,379.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,225.44 : 178,256.72 = 80,743.28 : x
  2. Step 2: Convert to fraction form
    129,225.44/178,256.72 = 80,743.28/x
  3. Step 3: Cross multiply
    129,225.44x = 178,256.72 × 80,743.28
  4. Step 4: Simplify right side
    129,225.44x = 14,393,032,254.84
  5. Step 5: Solve for x
    x = 14,393,032,254.84/129,225.44
  6. Step 6: Final answer
    x = 111,379.25

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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.