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Finding the Fourth Proportional to 158,328.27, 218,493.34 and 85,731.95

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Solution

The fourth proportional to 158,328.27, 218,493.34 and 85,731.95 is: 118,310.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,328.27 : 218,493.34 = 85,731.95 : x
  2. Step 2: Convert to fraction form
    158,328.27/218,493.34 = 85,731.95/x
  3. Step 3: Cross multiply
    158,328.27x = 218,493.34 × 85,731.95
  4. Step 4: Simplify right side
    158,328.27x = 18,731,860,100.21
  5. Step 5: Solve for x
    x = 18,731,860,100.21/158,328.27
  6. Step 6: Final answer
    x = 118,310.27

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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.