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Finding the Fourth Proportional to 136,874.81, 188,883.36 and 76,443.68

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Solution

The fourth proportional to 136,874.81, 188,883.36 and 76,443.68 is: 105,490.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,874.81 : 188,883.36 = 76,443.68 : x
  2. Step 2: Convert to fraction form
    136,874.81/188,883.36 = 76,443.68/x
  3. Step 3: Cross multiply
    136,874.81x = 188,883.36 × 76,443.68
  4. Step 4: Simplify right side
    136,874.81x = 14,438,938,184.75
  5. Step 5: Solve for x
    x = 14,438,938,184.75/136,874.81
  6. Step 6: Final answer
    x = 105,490.11

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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.