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Finding the Fourth Proportional to 61,939.99, 85,428.56 and 54,777.56

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Solution

The fourth proportional to 61,939.99, 85,428.56 and 54,777.56 is: 75,550.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,939.99 : 85,428.56 = 54,777.56 : x
  2. Step 2: Convert to fraction form
    61,939.99/85,428.56 = 54,777.56/x
  3. Step 3: Cross multiply
    61,939.99x = 85,428.56 × 54,777.56
  4. Step 4: Simplify right side
    61,939.99x = 4,679,567,797.23
  5. Step 5: Solve for x
    x = 4,679,567,797.23/61,939.99
  6. Step 6: Final answer
    x = 75,550.03

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1.5x scale

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.