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Finding the Fourth Proportional to 71,323.34, 106,969.51 and 21,390.02

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Solution

The fourth proportional to 71,323.34, 106,969.51 and 21,390.02 is: 32,080.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,323.34 : 106,969.51 = 21,390.02 : x
  2. Step 2: Convert to fraction form
    71,323.34/106,969.51 = 21,390.02/x
  3. Step 3: Cross multiply
    71,323.34x = 106,969.51 × 21,390.02
  4. Step 4: Simplify right side
    71,323.34x = 2,288,080,453.02
  5. Step 5: Solve for x
    x = 2,288,080,453.02/71,323.34
  6. Step 6: Final answer
    x = 32,080.39

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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.