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Finding the Fourth Proportional to 61,338.38, 91,890.24 and 51,406.64

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Solution

The fourth proportional to 61,338.38, 91,890.24 and 51,406.64 is: 77,011.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,338.38 : 91,890.24 = 51,406.64 : x
  2. Step 2: Convert to fraction form
    61,338.38/91,890.24 = 51,406.64/x
  3. Step 3: Cross multiply
    61,338.38x = 91,890.24 × 51,406.64
  4. Step 4: Simplify right side
    61,338.38x = 4,723,768,487.19
  5. Step 5: Solve for x
    x = 4,723,768,487.19/61,338.38
  6. Step 6: Final answer
    x = 77,011.63

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.