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Finding the Fourth Proportional to 90,642.65, 135,963.43 and 35,238.65

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Solution

The fourth proportional to 90,642.65, 135,963.43 and 35,238.65 is: 52,857.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,642.65 : 135,963.43 = 35,238.65 : x
  2. Step 2: Convert to fraction form
    90,642.65/135,963.43 = 35,238.65/x
  3. Step 3: Cross multiply
    90,642.65x = 135,963.43 × 35,238.65
  4. Step 4: Simplify right side
    90,642.65x = 4,791,166,954.66
  5. Step 5: Solve for x
    x = 4,791,166,954.66/90,642.65
  6. Step 6: Final answer
    x = 52,857.76

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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.