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Finding the Fourth Proportional to 89,709.66, 123,792.89 and 49,421.07

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Solution

The fourth proportional to 89,709.66, 123,792.89 and 49,421.07 is: 68,197.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,709.66 : 123,792.89 = 49,421.07 : x
  2. Step 2: Convert to fraction form
    89,709.66/123,792.89 = 49,421.07/x
  3. Step 3: Cross multiply
    89,709.66x = 123,792.89 × 49,421.07
  4. Step 4: Simplify right side
    89,709.66x = 6,117,976,835.09
  5. Step 5: Solve for x
    x = 6,117,976,835.09/89,709.66
  6. Step 6: Final answer
    x = 68,197.53

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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.