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Finding the Fourth Proportional to 136,790.72, 205,212 and 43,288.64

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Solution

The fourth proportional to 136,790.72, 205,212 and 43,288.64 is: 64,941.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,790.72 : 205,212 = 43,288.64 : x
  2. Step 2: Convert to fraction form
    136,790.72/205,212 = 43,288.64/x
  3. Step 3: Cross multiply
    136,790.72x = 205,212 × 43,288.64
  4. Step 4: Simplify right side
    136,790.72x = 8,883,348,391.68
  5. Step 5: Solve for x
    x = 8,883,348,391.68/136,790.72
  6. Step 6: Final answer
    x = 64,941.16

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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.