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Finding the Fourth Proportional to 186,879.72, 257,804.37 and 122,320.56

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Solution

The fourth proportional to 186,879.72, 257,804.37 and 122,320.56 is: 168,743.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,879.72 : 257,804.37 = 122,320.56 : x
  2. Step 2: Convert to fraction form
    186,879.72/257,804.37 = 122,320.56/x
  3. Step 3: Cross multiply
    186,879.72x = 257,804.37 × 122,320.56
  4. Step 4: Simplify right side
    186,879.72x = 31,534,774,908.85
  5. Step 5: Solve for x
    x = 31,534,774,908.85/186,879.72
  6. Step 6: Final answer
    x = 168,743.70

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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.