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Finding the Fourth Proportional to 71,124.46, 106,687.56 and 21,206.18

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Solution

The fourth proportional to 71,124.46, 106,687.56 and 21,206.18 is: 31,809.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,124.46 : 106,687.56 = 21,206.18 : x
  2. Step 2: Convert to fraction form
    71,124.46/106,687.56 = 21,206.18/x
  3. Step 3: Cross multiply
    71,124.46x = 106,687.56 × 21,206.18
  4. Step 4: Simplify right side
    71,124.46x = 2,262,435,601.12
  5. Step 5: Solve for x
    x = 2,262,435,601.12/71,124.46
  6. Step 6: Final answer
    x = 31,809.53

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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.