Home / 87,121.72-120,267.81-66,971.55

Finding the Fourth Proportional to 87,121.72, 120,267.81 and 66,971.55

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Solution

The fourth proportional to 87,121.72, 120,267.81 and 66,971.55 is: 92,451.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,121.72 : 120,267.81 = 66,971.55 : x
  2. Step 2: Convert to fraction form
    87,121.72/120,267.81 = 66,971.55/x
  3. Step 3: Cross multiply
    87,121.72x = 120,267.81 × 66,971.55
  4. Step 4: Simplify right side
    87,121.72x = 8,054,521,650.81
  5. Step 5: Solve for x
    x = 8,054,521,650.81/87,121.72
  6. Step 6: Final answer
    x = 92,451.36

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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.