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Finding the Fourth Proportional to 80,889.90, 121,334.85 and 63,977.10

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Solution

The fourth proportional to 80,889.90, 121,334.85 and 63,977.10 is: 95,965.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,889.90 : 121,334.85 = 63,977.10 : x
  2. Step 2: Convert to fraction form
    80,889.90/121,334.85 = 63,977.10/x
  3. Step 3: Cross multiply
    80,889.90x = 121,334.85 × 63,977.10
  4. Step 4: Simplify right side
    80,889.90x = 7,762,651,831.94
  5. Step 5: Solve for x
    x = 7,762,651,831.94/80,889.90
  6. Step 6: Final answer
    x = 95,965.65

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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.