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Finding the Fourth Proportional to 71,159.32, 106,744.98 and 21,236.20

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Solution

The fourth proportional to 71,159.32, 106,744.98 and 21,236.20 is: 31,856.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,159.32 : 106,744.98 = 21,236.20 : x
  2. Step 2: Convert to fraction form
    71,159.32/106,744.98 = 21,236.20/x
  3. Step 3: Cross multiply
    71,159.32x = 106,744.98 × 21,236.20
  4. Step 4: Simplify right side
    71,159.32x = 2,266,857,744.28
  5. Step 5: Solve for x
    x = 2,266,857,744.28/71,159.32
  6. Step 6: Final answer
    x = 31,856.09

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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.