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Finding the Fourth Proportional to 136,452.80, 188,292 and 76,017.28

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Solution

The fourth proportional to 136,452.80, 188,292 and 76,017.28 is: 104,896.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,452.80 : 188,292 = 76,017.28 : x
  2. Step 2: Convert to fraction form
    136,452.80/188,292 = 76,017.28/x
  3. Step 3: Cross multiply
    136,452.80x = 188,292 × 76,017.28
  4. Step 4: Simplify right side
    136,452.80x = 14,313,445,685.76
  5. Step 5: Solve for x
    x = 14,313,445,685.76/136,452.80
  6. Step 6: Final answer
    x = 104,896.68

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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.