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Finding the Fourth Proportional to 158,327.96, 218,492.91 and 85,731.64

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Solution

The fourth proportional to 158,327.96, 218,492.91 and 85,731.64 is: 118,309.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,327.96 : 218,492.91 = 85,731.64 : x
  2. Step 2: Convert to fraction form
    158,327.96/218,492.91 = 85,731.64/x
  3. Step 3: Cross multiply
    158,327.96x = 218,492.91 × 85,731.64
  4. Step 4: Simplify right side
    158,327.96x = 18,731,754,956.44
  5. Step 5: Solve for x
    x = 18,731,754,956.44/158,327.96
  6. Step 6: Final answer
    x = 118,309.84

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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.