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Finding the Fourth Proportional to 158,672.32, 218,967.91 and 87,056.27

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Solution

The fourth proportional to 158,672.32, 218,967.91 and 87,056.27 is: 120,137.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,672.32 : 218,967.91 = 87,056.27 : x
  2. Step 2: Convert to fraction form
    158,672.32/218,967.91 = 87,056.27/x
  3. Step 3: Cross multiply
    158,672.32x = 218,967.91 × 87,056.27
  4. Step 4: Simplify right side
    158,672.32x = 19,062,529,002.95
  5. Step 5: Solve for x
    x = 19,062,529,002.95/158,672.32
  6. Step 6: Final answer
    x = 120,137.71

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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.