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Finding the Fourth Proportional to 136,728.88, 205,004.32 and 56,744.82

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Solution

The fourth proportional to 136,728.88, 205,004.32 and 56,744.82 is: 85,080.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,728.88 : 205,004.32 = 56,744.82 : x
  2. Step 2: Convert to fraction form
    136,728.88/205,004.32 = 56,744.82/x
  3. Step 3: Cross multiply
    136,728.88x = 205,004.32 × 56,744.82
  4. Step 4: Simplify right side
    136,728.88x = 11,632,933,095.76
  5. Step 5: Solve for x
    x = 11,632,933,095.76/136,728.88
  6. Step 6: Final answer
    x = 85,080.29

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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.