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Finding the Fourth Proportional to 89,107.68, 123,130.80 and 84,788.96

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Solution

The fourth proportional to 89,107.68, 123,130.80 and 84,788.96 is: 117,163.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,107.68 : 123,130.80 = 84,788.96 : x
  2. Step 2: Convert to fraction form
    89,107.68/123,130.80 = 84,788.96/x
  3. Step 3: Cross multiply
    89,107.68x = 123,130.80 × 84,788.96
  4. Step 4: Simplify right side
    89,107.68x = 10,440,132,475.97
  5. Step 5: Solve for x
    x = 10,440,132,475.97/89,107.68
  6. Step 6: Final answer
    x = 117,163.11

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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.