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Finding the Fourth Proportional to 90,169.46, 124,415.43 and 54,361.79

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Solution

The fourth proportional to 90,169.46, 124,415.43 and 54,361.79 is: 75,008.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,169.46 : 124,415.43 = 54,361.79 : x
  2. Step 2: Convert to fraction form
    90,169.46/124,415.43 = 54,361.79/x
  3. Step 3: Cross multiply
    90,169.46x = 124,415.43 × 54,361.79
  4. Step 4: Simplify right side
    90,169.46x = 6,763,445,478.42
  5. Step 5: Solve for x
    x = 6,763,445,478.42/90,169.46
  6. Step 6: Final answer
    x = 75,008.16

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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.