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Finding the Fourth Proportional to 136,292.48, 188,085.75 and 75,863.78

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Solution

The fourth proportional to 136,292.48, 188,085.75 and 75,863.78 is: 104,693.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,292.48 : 188,085.75 = 75,863.78 : x
  2. Step 2: Convert to fraction form
    136,292.48/188,085.75 = 75,863.78/x
  3. Step 3: Cross multiply
    136,292.48x = 188,085.75 × 75,863.78
  4. Step 4: Simplify right side
    136,292.48x = 14,268,895,959.14
  5. Step 5: Solve for x
    x = 14,268,895,959.14/136,292.48
  6. Step 6: Final answer
    x = 104,693.20

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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.