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Finding the Fourth Proportional to 136,698.80, 205,048.20 and 122,920.70

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Solution

The fourth proportional to 136,698.80, 205,048.20 and 122,920.70 is: 184,381.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,698.80 : 205,048.20 = 122,920.70 : x
  2. Step 2: Convert to fraction form
    136,698.80/205,048.20 = 122,920.70/x
  3. Step 3: Cross multiply
    136,698.80x = 205,048.20 × 122,920.70
  4. Step 4: Simplify right side
    136,698.80x = 25,204,668,277.74
  5. Step 5: Solve for x
    x = 25,204,668,277.74/136,698.80
  6. Step 6: Final answer
    x = 184,381.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.