Home / 129,668.27-178,945.37-72,307.03

Finding the Fourth Proportional to 129,668.27, 178,945.37 and 72,307.03

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Solution

The fourth proportional to 129,668.27, 178,945.37 and 72,307.03 is: 99,785.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,668.27 : 178,945.37 = 72,307.03 : x
  2. Step 2: Convert to fraction form
    129,668.27/178,945.37 = 72,307.03/x
  3. Step 3: Cross multiply
    129,668.27x = 178,945.37 × 72,307.03
  4. Step 4: Simplify right side
    129,668.27x = 12,939,008,236.95
  5. Step 5: Solve for x
    x = 12,939,008,236.95/129,668.27
  6. Step 6: Final answer
    x = 99,785.46

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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.