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Finding the Fourth Proportional to 71,857.53, 107,777.79 and 19,270.71

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Solution

The fourth proportional to 71,857.53, 107,777.79 and 19,270.71 is: 28,903.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,857.53 : 107,777.79 = 19,270.71 : x
  2. Step 2: Convert to fraction form
    71,857.53/107,777.79 = 19,270.71/x
  3. Step 3: Cross multiply
    71,857.53x = 107,777.79 × 19,270.71
  4. Step 4: Simplify right side
    71,857.53x = 2,076,954,535.53
  5. Step 5: Solve for x
    x = 2,076,954,535.53/71,857.53
  6. Step 6: Final answer
    x = 28,903.78

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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.