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Finding the Fourth Proportional to 71,199.97, 106,780.18 and 21,268.24

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Solution

The fourth proportional to 71,199.97, 106,780.18 and 21,268.24 is: 31,896.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,199.97 : 106,780.18 = 21,268.24 : x
  2. Step 2: Convert to fraction form
    71,199.97/106,780.18 = 21,268.24/x
  3. Step 3: Cross multiply
    71,199.97x = 106,780.18 × 21,268.24
  4. Step 4: Simplify right side
    71,199.97x = 2,271,026,495.48
  5. Step 5: Solve for x
    x = 2,271,026,495.48/71,199.97
  6. Step 6: Final answer
    x = 31,896.45

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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.