Home / 136,905.75-188,929.94-77,289.75

Finding the Fourth Proportional to 136,905.75, 188,929.94 and 77,289.75

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Solution

The fourth proportional to 136,905.75, 188,929.94 and 77,289.75 is: 106,659.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,905.75 : 188,929.94 = 77,289.75 : x
  2. Step 2: Convert to fraction form
    136,905.75/188,929.94 = 77,289.75/x
  3. Step 3: Cross multiply
    136,905.75x = 188,929.94 × 77,289.75
  4. Step 4: Simplify right side
    136,905.75x = 14,602,347,443.67
  5. Step 5: Solve for x
    x = 14,602,347,443.67/136,905.75
  6. Step 6: Final answer
    x = 106,659.86

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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.