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Finding the Fourth Proportional to 136,643.73, 188,568.62 and 76,218.29

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Solution

The fourth proportional to 136,643.73, 188,568.62 and 76,218.29 is: 105,181.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,643.73 : 188,568.62 = 76,218.29 : x
  2. Step 2: Convert to fraction form
    136,643.73/188,568.62 = 76,218.29/x
  3. Step 3: Cross multiply
    136,643.73x = 188,568.62 × 76,218.29
  4. Step 4: Simplify right side
    136,643.73x = 14,372,376,440.13
  5. Step 5: Solve for x
    x = 14,372,376,440.13/136,643.73
  6. Step 6: Final answer
    x = 105,181.38

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1.5x scale

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.