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Finding the Fourth Proportional to 145,109.80, 217,664.70 and 136,361.80

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Solution

The fourth proportional to 145,109.80, 217,664.70 and 136,361.80 is: 204,542.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,109.80 : 217,664.70 = 136,361.80 : x
  2. Step 2: Convert to fraction form
    145,109.80/217,664.70 = 136,361.80/x
  3. Step 3: Cross multiply
    145,109.80x = 217,664.70 × 136,361.80
  4. Step 4: Simplify right side
    145,109.80x = 29,681,150,288.46
  5. Step 5: Solve for x
    x = 29,681,150,288.46/145,109.80
  6. Step 6: Final answer
    x = 204,542.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.