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Finding the Fourth Proportional to 71,155.62, 97,911.45 and 68,991.30

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Solution

The fourth proportional to 71,155.62, 97,911.45 and 68,991.30 is: 94,933.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,155.62 : 97,911.45 = 68,991.30 : x
  2. Step 2: Convert to fraction form
    71,155.62/97,911.45 = 68,991.30/x
  3. Step 3: Cross multiply
    71,155.62x = 97,911.45 × 68,991.30
  4. Step 4: Simplify right side
    71,155.62x = 6,755,038,220.39
  5. Step 5: Solve for x
    x = 6,755,038,220.39/71,155.62
  6. Step 6: Final answer
    x = 94,933.31

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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.