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Finding the Fourth Proportional to 72,449.28, 99,983.70 and 40,616.28

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Solution

The fourth proportional to 72,449.28, 99,983.70 and 40,616.28 is: 56,052.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,449.28 : 99,983.70 = 40,616.28 : x
  2. Step 2: Convert to fraction form
    72,449.28/99,983.70 = 40,616.28/x
  3. Step 3: Cross multiply
    72,449.28x = 99,983.70 × 40,616.28
  4. Step 4: Simplify right side
    72,449.28x = 4,060,965,954.64
  5. Step 5: Solve for x
    x = 4,060,965,954.64/72,449.28
  6. Step 6: Final answer
    x = 56,052.54

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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.