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Finding the Fourth Proportional to 71,671.87, 107,510.96 and 21,758.95

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Solution

The fourth proportional to 71,671.87, 107,510.96 and 21,758.95 is: 32,639.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,671.87 : 107,510.96 = 21,758.95 : x
  2. Step 2: Convert to fraction form
    71,671.87/107,510.96 = 21,758.95/x
  3. Step 3: Cross multiply
    71,671.87x = 107,510.96 × 21,758.95
  4. Step 4: Simplify right side
    71,671.87x = 2,339,325,603.09
  5. Step 5: Solve for x
    x = 2,339,325,603.09/71,671.87
  6. Step 6: Final answer
    x = 32,639.38

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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.