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Finding the Fourth Proportional to 85,426.84, 117,890.31 and 49,616.88

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Solution

The fourth proportional to 85,426.84, 117,890.31 and 49,616.88 is: 68,472.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,426.84 : 117,890.31 = 49,616.88 : x
  2. Step 2: Convert to fraction form
    85,426.84/117,890.31 = 49,616.88/x
  3. Step 3: Cross multiply
    85,426.84x = 117,890.31 × 49,616.88
  4. Step 4: Simplify right side
    85,426.84x = 5,849,349,364.43
  5. Step 5: Solve for x
    x = 5,849,349,364.43/85,426.84
  6. Step 6: Final answer
    x = 68,472.03

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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.