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Finding the Fourth Proportional to 71,007.52, 97,990.88 and 39,177.56

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Solution

The fourth proportional to 71,007.52, 97,990.88 and 39,177.56 is: 54,065.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,007.52 : 97,990.88 = 39,177.56 : x
  2. Step 2: Convert to fraction form
    71,007.52/97,990.88 = 39,177.56/x
  3. Step 3: Cross multiply
    71,007.52x = 97,990.88 × 39,177.56
  4. Step 4: Simplify right side
    71,007.52x = 3,839,043,580.65
  5. Step 5: Solve for x
    x = 3,839,043,580.65/71,007.52
  6. Step 6: Final answer
    x = 54,065.31

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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.