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Finding the Fourth Proportional to 71,900.14, 107,850.47 and 21,980.04

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Solution

The fourth proportional to 71,900.14, 107,850.47 and 21,980.04 is: 32,970.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,900.14 : 107,850.47 = 21,980.04 : x
  2. Step 2: Convert to fraction form
    71,900.14/107,850.47 = 21,980.04/x
  3. Step 3: Cross multiply
    71,900.14x = 107,850.47 × 21,980.04
  4. Step 4: Simplify right side
    71,900.14x = 2,370,557,644.62
  5. Step 5: Solve for x
    x = 2,370,557,644.62/71,900.14
  6. Step 6: Final answer
    x = 32,970.14

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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.