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Finding the Fourth Proportional to 71,903.72, 107,855.10 and 21,983.62

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Solution

The fourth proportional to 71,903.72, 107,855.10 and 21,983.62 is: 32,975.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,903.72 : 107,855.10 = 21,983.62 : x
  2. Step 2: Convert to fraction form
    71,903.72/107,855.10 = 21,983.62/x
  3. Step 3: Cross multiply
    71,903.72x = 107,855.10 × 21,983.62
  4. Step 4: Simplify right side
    71,903.72x = 2,371,045,533.46
  5. Step 5: Solve for x
    x = 2,371,045,533.46/71,903.72
  6. Step 6: Final answer
    x = 32,975.28

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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.