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Finding the Fourth Proportional to 71,736.20, 107,474.70 and 61,368.20

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Solution

The fourth proportional to 71,736.20, 107,474.70 and 61,368.20 is: 91,941.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,736.20 : 107,474.70 = 61,368.20 : x
  2. Step 2: Convert to fraction form
    71,736.20/107,474.70 = 61,368.20/x
  3. Step 3: Cross multiply
    71,736.20x = 107,474.70 × 61,368.20
  4. Step 4: Simplify right side
    71,736.20x = 6,595,528,884.54
  5. Step 5: Solve for x
    x = 6,595,528,884.54/71,736.20
  6. Step 6: Final answer
    x = 91,941.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.