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Finding the Fourth Proportional to 276,947.96, 415,421.94 and 66,585.90

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Solution

The fourth proportional to 276,947.96, 415,421.94 and 66,585.90 is: 99,878.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,947.96 : 415,421.94 = 66,585.90 : x
  2. Step 2: Convert to fraction form
    276,947.96/415,421.94 = 66,585.90/x
  3. Step 3: Cross multiply
    276,947.96x = 415,421.94 × 66,585.90
  4. Step 4: Simplify right side
    276,947.96x = 27,661,243,754.65
  5. Step 5: Solve for x
    x = 27,661,243,754.65/276,947.96
  6. Step 6: Final answer
    x = 99,878.85

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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.