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Finding the Fourth Proportional to 136,830.83, 205,687.55 and 126,881.66

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Solution

The fourth proportional to 136,830.83, 205,687.55 and 126,881.66 is: 190,731.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,830.83 : 205,687.55 = 126,881.66 : x
  2. Step 2: Convert to fraction form
    136,830.83/205,687.55 = 126,881.66/x
  3. Step 3: Cross multiply
    136,830.83x = 205,687.55 × 126,881.66
  4. Step 4: Simplify right side
    136,830.83x = 26,097,978,616.76
  5. Step 5: Solve for x
    x = 26,097,978,616.76/136,830.83
  6. Step 6: Final answer
    x = 190,731.72

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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.