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Finding the Fourth Proportional to 68,708.16, 94,795.74 and 38,489.40

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Solution

The fourth proportional to 68,708.16, 94,795.74 and 38,489.40 is: 53,103.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,708.16 : 94,795.74 = 38,489.40 : x
  2. Step 2: Convert to fraction form
    68,708.16/94,795.74 = 38,489.40/x
  3. Step 3: Cross multiply
    68,708.16x = 94,795.74 × 38,489.40
  4. Step 4: Simplify right side
    68,708.16x = 3,648,631,155.16
  5. Step 5: Solve for x
    x = 3,648,631,155.16/68,708.16
  6. Step 6: Final answer
    x = 53,103.32

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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.