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Finding the Fourth Proportional to 136,818.58, 188,813.41 and 76,386.90

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Solution

The fourth proportional to 136,818.58, 188,813.41 and 76,386.90 is: 105,416.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,818.58 : 188,813.41 = 76,386.90 : x
  2. Step 2: Convert to fraction form
    136,818.58/188,813.41 = 76,386.90/x
  3. Step 3: Cross multiply
    136,818.58x = 188,813.41 × 76,386.90
  4. Step 4: Simplify right side
    136,818.58x = 14,422,871,068.33
  5. Step 5: Solve for x
    x = 14,422,871,068.33/136,818.58
  6. Step 6: Final answer
    x = 105,416.03

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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.