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Finding the Fourth Proportional to 71,630.37, 107,420.13 and 21,015.27

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Solution

The fourth proportional to 71,630.37, 107,420.13 and 21,015.27 is: 31,515.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,630.37 : 107,420.13 = 21,015.27 : x
  2. Step 2: Convert to fraction form
    71,630.37/107,420.13 = 21,015.27/x
  3. Step 3: Cross multiply
    71,630.37x = 107,420.13 × 21,015.27
  4. Step 4: Simplify right side
    71,630.37x = 2,257,463,035.39
  5. Step 5: Solve for x
    x = 2,257,463,035.39/71,630.37
  6. Step 6: Final answer
    x = 31,515.45

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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.