Home / 186,861.78-257,865.66-101,979.45

Finding the Fourth Proportional to 186,861.78, 257,865.66 and 101,979.45

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Solution

The fourth proportional to 186,861.78, 257,865.66 and 101,979.45 is: 140,729.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,861.78 : 257,865.66 = 101,979.45 : x
  2. Step 2: Convert to fraction form
    186,861.78/257,865.66 = 101,979.45/x
  3. Step 3: Cross multiply
    186,861.78x = 257,865.66 × 101,979.45
  4. Step 4: Simplify right side
    186,861.78x = 26,296,998,180.69
  5. Step 5: Solve for x
    x = 26,296,998,180.69/186,861.78
  6. Step 6: Final answer
    x = 140,729.68

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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.