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Finding the Fourth Proportional to 90,761.65, 125,233.09 and 54,955

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Solution

The fourth proportional to 90,761.65, 125,233.09 and 54,955 is: 75,827.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,761.65 : 125,233.09 = 54,955 : x
  2. Step 2: Convert to fraction form
    90,761.65/125,233.09 = 54,955/x
  3. Step 3: Cross multiply
    90,761.65x = 125,233.09 × 54,955
  4. Step 4: Simplify right side
    90,761.65x = 6,882,184,460.95
  5. Step 5: Solve for x
    x = 6,882,184,460.95/90,761.65
  6. Step 6: Final answer
    x = 75,827.01

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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.