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Finding the Fourth Proportional to 261,777.81, 392,666.72 and 74,789.31

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Solution

The fourth proportional to 261,777.81, 392,666.72 and 74,789.31 is: 112,183.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,777.81 : 392,666.72 = 74,789.31 : x
  2. Step 2: Convert to fraction form
    261,777.81/392,666.72 = 74,789.31/x
  3. Step 3: Cross multiply
    261,777.81x = 392,666.72 × 74,789.31
  4. Step 4: Simplify right side
    261,777.81x = 29,367,273,048.76
  5. Step 5: Solve for x
    x = 29,367,273,048.76/261,777.81
  6. Step 6: Final answer
    x = 112,183.97

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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.