Home / 136,743.89-188,698.70-76,309.79

Finding the Fourth Proportional to 136,743.89, 188,698.70 and 76,309.79

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Solution

The fourth proportional to 136,743.89, 188,698.70 and 76,309.79 is: 105,303.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,743.89 : 188,698.70 = 76,309.79 : x
  2. Step 2: Convert to fraction form
    136,743.89/188,698.70 = 76,309.79/x
  3. Step 3: Cross multiply
    136,743.89x = 188,698.70 × 76,309.79
  4. Step 4: Simplify right side
    136,743.89x = 14,399,557,788.72
  5. Step 5: Solve for x
    x = 14,399,557,788.72/136,743.89
  6. Step 6: Final answer
    x = 105,303.12

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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.