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Finding the Fourth Proportional to 68,953.50, 95,155.92 and 39,145.50

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Solution

The fourth proportional to 68,953.50, 95,155.92 and 39,145.50 is: 54,020.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,953.50 : 95,155.92 = 39,145.50 : x
  2. Step 2: Convert to fraction form
    68,953.50/95,155.92 = 39,145.50/x
  3. Step 3: Cross multiply
    68,953.50x = 95,155.92 × 39,145.50
  4. Step 4: Simplify right side
    68,953.50x = 3,724,926,066.36
  5. Step 5: Solve for x
    x = 3,724,926,066.36/68,953.50
  6. Step 6: Final answer
    x = 54,020.84

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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.