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Finding the Fourth Proportional to 71,637.54, 98,867.16 and 39,816.69

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Solution

The fourth proportional to 71,637.54, 98,867.16 and 39,816.69 is: 54,951.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,637.54 : 98,867.16 = 39,816.69 : x
  2. Step 2: Convert to fraction form
    71,637.54/98,867.16 = 39,816.69/x
  3. Step 3: Cross multiply
    71,637.54x = 98,867.16 × 39,816.69
  4. Step 4: Simplify right side
    71,637.54x = 3,936,563,060.90
  5. Step 5: Solve for x
    x = 3,936,563,060.90/71,637.54
  6. Step 6: Final answer
    x = 54,951.12

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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.