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Finding the Fourth Proportional to 68,863.40, 103,295.10 and 57,709.70

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Solution

The fourth proportional to 68,863.40, 103,295.10 and 57,709.70 is: 86,564.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,863.40 : 103,295.10 = 57,709.70 : x
  2. Step 2: Convert to fraction form
    68,863.40/103,295.10 = 57,709.70/x
  3. Step 3: Cross multiply
    68,863.40x = 103,295.10 × 57,709.70
  4. Step 4: Simplify right side
    68,863.40x = 5,961,129,232.47
  5. Step 5: Solve for x
    x = 5,961,129,232.47/68,863.40
  6. Step 6: Final answer
    x = 86,564.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.