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Finding the Fourth Proportional to 159,520.30, 220,142.64 and 87,904.94

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Solution

The fourth proportional to 159,520.30, 220,142.64 and 87,904.94 is: 121,311.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,520.30 : 220,142.64 = 87,904.94 : x
  2. Step 2: Convert to fraction form
    159,520.30/220,142.64 = 87,904.94/x
  3. Step 3: Cross multiply
    159,520.30x = 220,142.64 × 87,904.94
  4. Step 4: Simplify right side
    159,520.30x = 19,351,625,560.64
  5. Step 5: Solve for x
    x = 19,351,625,560.64/159,520.30
  6. Step 6: Final answer
    x = 121,311.37

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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.