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Finding the Fourth Proportional to 89,695.80, 123,781.03 and 49,410.99

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Solution

The fourth proportional to 89,695.80, 123,781.03 and 49,410.99 is: 68,187.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,695.80 : 123,781.03 = 49,410.99 : x
  2. Step 2: Convert to fraction form
    89,695.80/123,781.03 = 49,410.99/x
  3. Step 3: Cross multiply
    89,695.80x = 123,781.03 × 49,410.99
  4. Step 4: Simplify right side
    89,695.80x = 6,116,143,111.99
  5. Step 5: Solve for x
    x = 6,116,143,111.99/89,695.80
  6. Step 6: Final answer
    x = 68,187.62

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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.