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Finding the Fourth Proportional to 210,625.80, 315,938.70 and 92,171.40

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Solution

The fourth proportional to 210,625.80, 315,938.70 and 92,171.40 is: 138,257.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,625.80 : 315,938.70 = 92,171.40 : x
  2. Step 2: Convert to fraction form
    210,625.80/315,938.70 = 92,171.40/x
  3. Step 3: Cross multiply
    210,625.80x = 315,938.70 × 92,171.40
  4. Step 4: Simplify right side
    210,625.80x = 29,120,512,293.18
  5. Step 5: Solve for x
    x = 29,120,512,293.18/210,625.80
  6. Step 6: Final answer
    x = 138,257.10

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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.