Home / 72,009.74-99,378.24-40,179.36

Finding the Fourth Proportional to 72,009.74, 99,378.24 and 40,179.36

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Solution

The fourth proportional to 72,009.74, 99,378.24 and 40,179.36 is: 55,450.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,009.74 : 99,378.24 = 40,179.36 : x
  2. Step 2: Convert to fraction form
    72,009.74/99,378.24 = 40,179.36/x
  3. Step 3: Cross multiply
    72,009.74x = 99,378.24 × 40,179.36
  4. Step 4: Simplify right side
    72,009.74x = 3,992,954,081.13
  5. Step 5: Solve for x
    x = 3,992,954,081.13/72,009.74
  6. Step 6: Final answer
    x = 55,450.19

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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.