Home / 72,011.76-99,378.30-40,179.96

Finding the Fourth Proportional to 72,011.76, 99,378.30 and 40,179.96

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Solution

The fourth proportional to 72,011.76, 99,378.30 and 40,179.96 is: 55,449.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,011.76 : 99,378.30 = 40,179.96 : x
  2. Step 2: Convert to fraction form
    72,011.76/99,378.30 = 40,179.96/x
  3. Step 3: Cross multiply
    72,011.76x = 99,378.30 × 40,179.96
  4. Step 4: Simplify right side
    72,011.76x = 3,993,016,118.87
  5. Step 5: Solve for x
    x = 3,993,016,118.87/72,011.76
  6. Step 6: Final answer
    x = 55,449.50

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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.