Home / 72,401.43-99,908.94-40,135.74

Finding the Fourth Proportional to 72,401.43, 99,908.94 and 40,135.74

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Solution

The fourth proportional to 72,401.43, 99,908.94 and 40,135.74 is: 55,384.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,401.43 : 99,908.94 = 40,135.74 : x
  2. Step 2: Convert to fraction form
    72,401.43/99,908.94 = 40,135.74/x
  3. Step 3: Cross multiply
    72,401.43x = 99,908.94 × 40,135.74
  4. Step 4: Simplify right side
    72,401.43x = 4,009,919,182.87
  5. Step 5: Solve for x
    x = 4,009,919,182.87/72,401.43
  6. Step 6: Final answer
    x = 55,384.53

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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.