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Finding the Fourth Proportional to 72,193.92, 99,628.92 and 40,359.42

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Solution

The fourth proportional to 72,193.92, 99,628.92 and 40,359.42 is: 55,696.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,193.92 : 99,628.92 = 40,359.42 : x
  2. Step 2: Convert to fraction form
    72,193.92/99,628.92 = 40,359.42/x
  3. Step 3: Cross multiply
    72,193.92x = 99,628.92 × 40,359.42
  4. Step 4: Simplify right side
    72,193.92x = 4,020,965,426.43
  5. Step 5: Solve for x
    x = 4,020,965,426.43/72,193.92
  6. Step 6: Final answer
    x = 55,696.73

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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.