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Finding the Fourth Proportional to 75,812.70, 113,719.05 and 20,408.70

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Solution

The fourth proportional to 75,812.70, 113,719.05 and 20,408.70 is: 30,613.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,812.70 : 113,719.05 = 20,408.70 : x
  2. Step 2: Convert to fraction form
    75,812.70/113,719.05 = 20,408.70/x
  3. Step 3: Cross multiply
    75,812.70x = 113,719.05 × 20,408.70
  4. Step 4: Simplify right side
    75,812.70x = 2,320,857,975.74
  5. Step 5: Solve for x
    x = 2,320,857,975.74/75,812.70
  6. Step 6: Final answer
    x = 30,613.05

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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.