Home / 72,138.42-99,552.78-40,309.38

Finding the Fourth Proportional to 72,138.42, 99,552.78 and 40,309.38

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Solution

The fourth proportional to 72,138.42, 99,552.78 and 40,309.38 is: 55,627.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,138.42 : 99,552.78 = 40,309.38 : x
  2. Step 2: Convert to fraction form
    72,138.42/99,552.78 = 40,309.38/x
  3. Step 3: Cross multiply
    72,138.42x = 99,552.78 × 40,309.38
  4. Step 4: Simplify right side
    72,138.42x = 4,012,910,839.08
  5. Step 5: Solve for x
    x = 4,012,910,839.08/72,138.42
  6. Step 6: Final answer
    x = 55,627.93

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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.