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Finding the Fourth Proportional to 71,905.30, 107,858.25 and 21,985.24

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Solution

The fourth proportional to 71,905.30, 107,858.25 and 21,985.24 is: 32,977.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,905.30 : 107,858.25 = 21,985.24 : x
  2. Step 2: Convert to fraction form
    71,905.30/107,858.25 = 21,985.24/x
  3. Step 3: Cross multiply
    71,905.30x = 107,858.25 × 21,985.24
  4. Step 4: Simplify right side
    71,905.30x = 2,371,289,512.23
  5. Step 5: Solve for x
    x = 2,371,289,512.23/71,905.30
  6. Step 6: Final answer
    x = 32,977.95

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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.