Home / 72,409.06-99,919.47-40,143.43

Finding the Fourth Proportional to 72,409.06, 99,919.47 and 40,143.43

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Solution

The fourth proportional to 72,409.06, 99,919.47 and 40,143.43 is: 55,395.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,409.06 : 99,919.47 = 40,143.43 : x
  2. Step 2: Convert to fraction form
    72,409.06/99,919.47 = 40,143.43/x
  3. Step 3: Cross multiply
    72,409.06x = 99,919.47 × 40,143.43
  4. Step 4: Simplify right side
    72,409.06x = 4,011,110,249.58
  5. Step 5: Solve for x
    x = 4,011,110,249.58/72,409.06
  6. Step 6: Final answer
    x = 55,395.14

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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.