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Finding the Fourth Proportional to 212,654.96, 318,971.84 and 79,525.43

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Solution

The fourth proportional to 212,654.96, 318,971.84 and 79,525.43 is: 119,284.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,654.96 : 318,971.84 = 79,525.43 : x
  2. Step 2: Convert to fraction form
    212,654.96/318,971.84 = 79,525.43/x
  3. Step 3: Cross multiply
    212,654.96x = 318,971.84 × 79,525.43
  4. Step 4: Simplify right side
    212,654.96x = 25,366,373,730.13
  5. Step 5: Solve for x
    x = 25,366,373,730.13/212,654.96
  6. Step 6: Final answer
    x = 119,284.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.