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Finding the Fourth Proportional to 159,142.76, 219,611.91 and 87,522.56

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Solution

The fourth proportional to 159,142.76, 219,611.91 and 87,522.56 is: 120,778.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,142.76 : 219,611.91 = 87,522.56 : x
  2. Step 2: Convert to fraction form
    159,142.76/219,611.91 = 87,522.56/x
  3. Step 3: Cross multiply
    159,142.76x = 219,611.91 × 87,522.56
  4. Step 4: Simplify right side
    159,142.76x = 19,220,996,569.69
  5. Step 5: Solve for x
    x = 19,220,996,569.69/159,142.76
  6. Step 6: Final answer
    x = 120,778.33

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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.