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Finding the Fourth Proportional to 73,380.40, 109,924.80 and 40,040.80

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Solution

The fourth proportional to 73,380.40, 109,924.80 and 40,040.80 is: 59,981.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,380.40 : 109,924.80 = 40,040.80 : x
  2. Step 2: Convert to fraction form
    73,380.40/109,924.80 = 40,040.80/x
  3. Step 3: Cross multiply
    73,380.40x = 109,924.80 × 40,040.80
  4. Step 4: Simplify right side
    73,380.40x = 4,401,476,931.84
  5. Step 5: Solve for x
    x = 4,401,476,931.84/73,380.40
  6. Step 6: Final answer
    x = 59,981.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.