Home / 129,387.20-178,541.64-72,797.36

Finding the Fourth Proportional to 129,387.20, 178,541.64 and 72,797.36

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Solution

The fourth proportional to 129,387.20, 178,541.64 and 72,797.36 is: 100,453.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,387.20 : 178,541.64 = 72,797.36 : x
  2. Step 2: Convert to fraction form
    129,387.20/178,541.64 = 72,797.36/x
  3. Step 3: Cross multiply
    129,387.20x = 178,541.64 × 72,797.36
  4. Step 4: Simplify right side
    129,387.20x = 12,997,360,042.07
  5. Step 5: Solve for x
    x = 12,997,360,042.07/129,387.20
  6. Step 6: Final answer
    x = 100,453.21

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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.