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Finding the Fourth Proportional to 85,481.16, 117,955.26 and 49,678.80

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Solution

The fourth proportional to 85,481.16, 117,955.26 and 49,678.80 is: 68,551.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,481.16 : 117,955.26 = 49,678.80 : x
  2. Step 2: Convert to fraction form
    85,481.16/117,955.26 = 49,678.80/x
  3. Step 3: Cross multiply
    85,481.16x = 117,955.26 × 49,678.80
  4. Step 4: Simplify right side
    85,481.16x = 5,859,875,770.49
  5. Step 5: Solve for x
    x = 5,859,875,770.49/85,481.16
  6. Step 6: Final answer
    x = 68,551.66

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1.5x scale

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.