Home / 129,940.27-179,315.64-72,580.39

Finding the Fourth Proportional to 129,940.27, 179,315.64 and 72,580.39

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Solution

The fourth proportional to 129,940.27, 179,315.64 and 72,580.39 is: 100,159.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,940.27 : 179,315.64 = 72,580.39 : x
  2. Step 2: Convert to fraction form
    129,940.27/179,315.64 = 72,580.39/x
  3. Step 3: Cross multiply
    129,940.27x = 179,315.64 × 72,580.39
  4. Step 4: Simplify right side
    129,940.27x = 13,014,798,636.01
  5. Step 5: Solve for x
    x = 13,014,798,636.01/129,940.27
  6. Step 6: Final answer
    x = 100,159.86

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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.