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Finding the Fourth Proportional to 68,561.16, 94,608.50 and 39,881.40

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Solution

The fourth proportional to 68,561.16, 94,608.50 and 39,881.40 is: 55,032.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,561.16 : 94,608.50 = 39,881.40 : x
  2. Step 2: Convert to fraction form
    68,561.16/94,608.50 = 39,881.40/x
  3. Step 3: Cross multiply
    68,561.16x = 94,608.50 × 39,881.40
  4. Step 4: Simplify right side
    68,561.16x = 3,773,119,431.90
  5. Step 5: Solve for x
    x = 3,773,119,431.90/68,561.16
  6. Step 6: Final answer
    x = 55,032.90

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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.