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Finding the Fourth Proportional to 68,306.70, 94,201.80 and 42,815.64

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Solution

The fourth proportional to 68,306.70, 94,201.80 and 42,815.64 is: 59,047.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,306.70 : 94,201.80 = 42,815.64 : x
  2. Step 2: Convert to fraction form
    68,306.70/94,201.80 = 42,815.64/x
  3. Step 3: Cross multiply
    68,306.70x = 94,201.80 × 42,815.64
  4. Step 4: Simplify right side
    68,306.70x = 4,033,310,356.15
  5. Step 5: Solve for x
    x = 4,033,310,356.15/68,306.70
  6. Step 6: Final answer
    x = 59,047.07

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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.