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Finding the Fourth Proportional to 71,003.56, 106,487.07 and 21,071.83

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Solution

The fourth proportional to 71,003.56, 106,487.07 and 21,071.83 is: 31,602.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,003.56 : 106,487.07 = 21,071.83 : x
  2. Step 2: Convert to fraction form
    71,003.56/106,487.07 = 21,071.83/x
  3. Step 3: Cross multiply
    71,003.56x = 106,487.07 × 21,071.83
  4. Step 4: Simplify right side
    71,003.56x = 2,243,877,436.24
  5. Step 5: Solve for x
    x = 2,243,877,436.24/71,003.56
  6. Step 6: Final answer
    x = 31,602.32

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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.