Home / 72,003.84-99,364.92-40,172.68

Finding the Fourth Proportional to 72,003.84, 99,364.92 and 40,172.68

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Solution

The fourth proportional to 72,003.84, 99,364.92 and 40,172.68 is: 55,438.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,003.84 : 99,364.92 = 40,172.68 : x
  2. Step 2: Convert to fraction form
    72,003.84/99,364.92 = 40,172.68/x
  3. Step 3: Cross multiply
    72,003.84x = 99,364.92 × 40,172.68
  4. Step 4: Simplify right side
    72,003.84x = 3,991,755,134.39
  5. Step 5: Solve for x
    x = 3,991,755,134.39/72,003.84
  6. Step 6: Final answer
    x = 55,438.09

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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.