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Finding the Fourth Proportional to 72,003.58, 99,369.93 and 40,178.68

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Solution

The fourth proportional to 72,003.58, 99,369.93 and 40,178.68 is: 55,449.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,003.58 : 99,369.93 = 40,178.68 : x
  2. Step 2: Convert to fraction form
    72,003.58/99,369.93 = 40,178.68/x
  3. Step 3: Cross multiply
    72,003.58x = 99,369.93 × 40,178.68
  4. Step 4: Simplify right side
    72,003.58x = 3,992,552,619.09
  5. Step 5: Solve for x
    x = 3,992,552,619.09/72,003.58
  6. Step 6: Final answer
    x = 55,449.36

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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.