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Finding the Fourth Proportional to 61,846.65, 85,357.54 and 39,187.75

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Solution

The fourth proportional to 61,846.65, 85,357.54 and 39,187.75 is: 54,084.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,846.65 : 85,357.54 = 39,187.75 : x
  2. Step 2: Convert to fraction form
    61,846.65/85,357.54 = 39,187.75/x
  3. Step 3: Cross multiply
    61,846.65x = 85,357.54 × 39,187.75
  4. Step 4: Simplify right side
    61,846.65x = 3,344,969,938.14
  5. Step 5: Solve for x
    x = 3,344,969,938.14/61,846.65
  6. Step 6: Final answer
    x = 54,084.90

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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.