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Finding the Fourth Proportional to 47,227.60, 70,808.60 and 20,918.16

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Solution

The fourth proportional to 47,227.60, 70,808.60 and 20,918.16 is: 31,362.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,227.60 : 70,808.60 = 20,918.16 : x
  2. Step 2: Convert to fraction form
    47,227.60/70,808.60 = 20,918.16/x
  3. Step 3: Cross multiply
    47,227.60x = 70,808.60 × 20,918.16
  4. Step 4: Simplify right side
    47,227.60x = 1,481,185,624.18
  5. Step 5: Solve for x
    x = 1,481,185,624.18/47,227.60
  6. Step 6: Final answer
    x = 31,362.71

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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.