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Finding the Fourth Proportional to 89,860.49, 124,005.92 and 49,578.11

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Solution

The fourth proportional to 89,860.49, 124,005.92 and 49,578.11 is: 68,416.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,860.49 : 124,005.92 = 49,578.11 : x
  2. Step 2: Convert to fraction form
    89,860.49/124,005.92 = 49,578.11/x
  3. Step 3: Cross multiply
    89,860.49x = 124,005.92 × 49,578.11
  4. Step 4: Simplify right side
    89,860.49x = 6,147,979,142.41
  5. Step 5: Solve for x
    x = 6,147,979,142.41/89,860.49
  6. Step 6: Final answer
    x = 68,416.93

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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.