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Finding the Fourth Proportional to 134,361.75, 185,398.05 and 76,990.05

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Solution

The fourth proportional to 134,361.75, 185,398.05 and 76,990.05 is: 106,234.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,361.75 : 185,398.05 = 76,990.05 : x
  2. Step 2: Convert to fraction form
    134,361.75/185,398.05 = 76,990.05/x
  3. Step 3: Cross multiply
    134,361.75x = 185,398.05 × 76,990.05
  4. Step 4: Simplify right side
    134,361.75x = 14,273,805,428.12
  5. Step 5: Solve for x
    x = 14,273,805,428.12/134,361.75
  6. Step 6: Final answer
    x = 106,234.14

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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.