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Finding the Fourth Proportional to 69,318.99, 95,661 and 42,087.20

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Solution

The fourth proportional to 69,318.99, 95,661 and 42,087.20 is: 58,080.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,318.99 : 95,661 = 42,087.20 : x
  2. Step 2: Convert to fraction form
    69,318.99/95,661 = 42,087.20/x
  3. Step 3: Cross multiply
    69,318.99x = 95,661 × 42,087.20
  4. Step 4: Simplify right side
    69,318.99x = 4,026,103,160.90
  5. Step 5: Solve for x
    x = 4,026,103,160.90/69,318.99
  6. Step 6: Final answer
    x = 58,080.81

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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.