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Finding the Fourth Proportional to 159,369.87, 219,931.22 and 91,389.41

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Solution

The fourth proportional to 159,369.87, 219,931.22 and 91,389.41 is: 126,117.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,369.87 : 219,931.22 = 91,389.41 : x
  2. Step 2: Convert to fraction form
    159,369.87/219,931.22 = 91,389.41/x
  3. Step 3: Cross multiply
    159,369.87x = 219,931.22 × 91,389.41
  4. Step 4: Simplify right side
    159,369.87x = 20,099,383,565.20
  5. Step 5: Solve for x
    x = 20,099,383,565.20/159,369.87
  6. Step 6: Final answer
    x = 126,117.84

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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.