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Finding the Fourth Proportional to 85,292.40, 117,672.64 and 49,462.72

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Solution

The fourth proportional to 85,292.40, 117,672.64 and 49,462.72 is: 68,240.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,292.40 : 117,672.64 = 49,462.72 : x
  2. Step 2: Convert to fraction form
    85,292.40/117,672.64 = 49,462.72/x
  3. Step 3: Cross multiply
    85,292.40x = 117,672.64 × 49,462.72
  4. Step 4: Simplify right side
    85,292.40x = 5,820,408,843.98
  5. Step 5: Solve for x
    x = 5,820,408,843.98/85,292.40
  6. Step 6: Final answer
    x = 68,240.65

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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.