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Finding the Fourth Proportional to 85,298.78, 117,702.86 and 49,481.84

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Solution

The fourth proportional to 85,298.78, 117,702.86 and 49,481.84 is: 68,279.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,298.78 : 117,702.86 = 49,481.84 : x
  2. Step 2: Convert to fraction form
    85,298.78/117,702.86 = 49,481.84/x
  3. Step 3: Cross multiply
    85,298.78x = 117,702.86 × 49,481.84
  4. Step 4: Simplify right side
    85,298.78x = 5,824,154,086.06
  5. Step 5: Solve for x
    x = 5,824,154,086.06/85,298.78
  6. Step 6: Final answer
    x = 68,279.45

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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.