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Finding the Fourth Proportional to 71,996.94, 99,355.48 and 40,165.88

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Solution

The fourth proportional to 71,996.94, 99,355.48 and 40,165.88 is: 55,428.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,996.94 : 99,355.48 = 40,165.88 : x
  2. Step 2: Convert to fraction form
    71,996.94/99,355.48 = 40,165.88/x
  3. Step 3: Cross multiply
    71,996.94x = 99,355.48 × 40,165.88
  4. Step 4: Simplify right side
    71,996.94x = 3,990,699,689.83
  5. Step 5: Solve for x
    x = 3,990,699,689.83/71,996.94
  6. Step 6: Final answer
    x = 55,428.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.