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Finding the Fourth Proportional to 71,921.34, 99,249.16 and 45,078.34

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Solution

The fourth proportional to 71,921.34, 99,249.16 and 45,078.34 is: 62,206.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,921.34 : 99,249.16 = 45,078.34 : x
  2. Step 2: Convert to fraction form
    71,921.34/99,249.16 = 45,078.34/x
  3. Step 3: Cross multiply
    71,921.34x = 99,249.16 × 45,078.34
  4. Step 4: Simplify right side
    71,921.34x = 4,473,987,379.19
  5. Step 5: Solve for x
    x = 4,473,987,379.19/71,921.34
  6. Step 6: Final answer
    x = 62,206.67

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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.