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Finding the Fourth Proportional to 212,513.22, 318,530.61 and 92,671.02

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Solution

The fourth proportional to 212,513.22, 318,530.61 and 92,671.02 is: 138,902.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,513.22 : 318,530.61 = 92,671.02 : x
  2. Step 2: Convert to fraction form
    212,513.22/318,530.61 = 92,671.02/x
  3. Step 3: Cross multiply
    212,513.22x = 318,530.61 × 92,671.02
  4. Step 4: Simplify right side
    212,513.22x = 29,518,556,529.92
  5. Step 5: Solve for x
    x = 29,518,556,529.92/212,513.22
  6. Step 6: Final answer
    x = 138,902.21

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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.