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Finding the Fourth Proportional to 136,751.08, 188,716.08 and 76,321.06

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Solution

The fourth proportional to 136,751.08, 188,716.08 and 76,321.06 is: 105,322.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,751.08 : 188,716.08 = 76,321.06 : x
  2. Step 2: Convert to fraction form
    136,751.08/188,716.08 = 76,321.06/x
  3. Step 3: Cross multiply
    136,751.08x = 188,716.08 × 76,321.06
  4. Step 4: Simplify right side
    136,751.08x = 14,403,011,264.64
  5. Step 5: Solve for x
    x = 14,403,011,264.64/136,751.08
  6. Step 6: Final answer
    x = 105,322.83

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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.