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Finding the Fourth Proportional to 90,765.88, 125,254.74 and 49,371.82

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Solution

The fourth proportional to 90,765.88, 125,254.74 and 49,371.82 is: 68,131.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,765.88 : 125,254.74 = 49,371.82 : x
  2. Step 2: Convert to fraction form
    90,765.88/125,254.74 = 49,371.82/x
  3. Step 3: Cross multiply
    90,765.88x = 125,254.74 × 49,371.82
  4. Step 4: Simplify right side
    90,765.88x = 6,184,054,477.43
  5. Step 5: Solve for x
    x = 6,184,054,477.43/90,765.88
  6. Step 6: Final answer
    x = 68,131.93

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.