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Finding the Fourth Proportional to 136,668.84, 204,993.18 and 65,642.28

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Solution

The fourth proportional to 136,668.84, 204,993.18 and 65,642.28 is: 98,458.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,668.84 : 204,993.18 = 65,642.28 : x
  2. Step 2: Convert to fraction form
    136,668.84/204,993.18 = 65,642.28/x
  3. Step 3: Cross multiply
    136,668.84x = 204,993.18 × 65,642.28
  4. Step 4: Simplify right side
    136,668.84x = 13,456,219,719.65
  5. Step 5: Solve for x
    x = 13,456,219,719.65/136,668.84
  6. Step 6: Final answer
    x = 98,458.58

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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.