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Finding the Fourth Proportional to 87,099.80, 120,223.28 and 56,889.74

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Solution

The fourth proportional to 87,099.80, 120,223.28 and 56,889.74 is: 78,524.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,099.80 : 120,223.28 = 56,889.74 : x
  2. Step 2: Convert to fraction form
    87,099.80/120,223.28 = 56,889.74/x
  3. Step 3: Cross multiply
    87,099.80x = 120,223.28 × 56,889.74
  4. Step 4: Simplify right side
    87,099.80x = 6,839,471,141.15
  5. Step 5: Solve for x
    x = 6,839,471,141.15/87,099.80
  6. Step 6: Final answer
    x = 78,524.53

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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.