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Finding the Fourth Proportional to 87,645.90, 120,960.95 and 50,860.21

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Solution

The fourth proportional to 87,645.90, 120,960.95 and 50,860.21 is: 70,192.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,645.90 : 120,960.95 = 50,860.21 : x
  2. Step 2: Convert to fraction form
    87,645.90/120,960.95 = 50,860.21/x
  3. Step 3: Cross multiply
    87,645.90x = 120,960.95 × 50,860.21
  4. Step 4: Simplify right side
    87,645.90x = 6,152,099,581.68
  5. Step 5: Solve for x
    x = 6,152,099,581.68/87,645.90
  6. Step 6: Final answer
    x = 70,192.67

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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.