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Finding the Fourth Proportional to 80,777.58, 121,157.10 and 21,617.87

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Solution

The fourth proportional to 80,777.58, 121,157.10 and 21,617.87 is: 32,424.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,777.58 : 121,157.10 = 21,617.87 : x
  2. Step 2: Convert to fraction form
    80,777.58/121,157.10 = 21,617.87/x
  3. Step 3: Cross multiply
    80,777.58x = 121,157.10 × 21,617.87
  4. Step 4: Simplify right side
    80,777.58x = 2,619,157,831.59
  5. Step 5: Solve for x
    x = 2,619,157,831.59/80,777.58
  6. Step 6: Final answer
    x = 32,424.32

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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.