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Finding the Fourth Proportional to 71,007.89, 97,991.42 and 39,177.95

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Solution

The fourth proportional to 71,007.89, 97,991.42 and 39,177.95 is: 54,065.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,007.89 : 97,991.42 = 39,177.95 : x
  2. Step 2: Convert to fraction form
    71,007.89/97,991.42 = 39,177.95/x
  3. Step 3: Cross multiply
    71,007.89x = 97,991.42 × 39,177.95
  4. Step 4: Simplify right side
    71,007.89x = 3,839,102,267.34
  5. Step 5: Solve for x
    x = 3,839,102,267.34/71,007.89
  6. Step 6: Final answer
    x = 54,065.86

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1.5x scale

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.