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Finding the Fourth Proportional to 71,063.56, 106,585.61 and 21,151.36

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Solution

The fourth proportional to 71,063.56, 106,585.61 and 21,151.36 is: 31,724.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,063.56 : 106,585.61 = 21,151.36 : x
  2. Step 2: Convert to fraction form
    71,063.56/106,585.61 = 21,151.36/x
  3. Step 3: Cross multiply
    71,063.56x = 106,585.61 × 21,151.36
  4. Step 4: Simplify right side
    71,063.56x = 2,254,430,607.93
  5. Step 5: Solve for x
    x = 2,254,430,607.93/71,063.56
  6. Step 6: Final answer
    x = 31,724.14

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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.