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Finding the Fourth Proportional to 91,248.36, 136,876.42 and 28,917.48

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Solution

The fourth proportional to 91,248.36, 136,876.42 and 28,917.48 is: 43,377.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,248.36 : 136,876.42 = 28,917.48 : x
  2. Step 2: Convert to fraction form
    91,248.36/136,876.42 = 28,917.48/x
  3. Step 3: Cross multiply
    91,248.36x = 136,876.42 × 28,917.48
  4. Step 4: Simplify right side
    91,248.36x = 3,958,121,137.82
  5. Step 5: Solve for x
    x = 3,958,121,137.82/91,248.36
  6. Step 6: Final answer
    x = 43,377.45

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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.