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Finding the Fourth Proportional to 213,909, 295,272.18 and 124,485

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Solution

The fourth proportional to 213,909, 295,272.18 and 124,485 is: 171,834.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,909 : 295,272.18 = 124,485 : x
  2. Step 2: Convert to fraction form
    213,909/295,272.18 = 124,485/x
  3. Step 3: Cross multiply
    213,909x = 295,272.18 × 124,485
  4. Step 4: Simplify right side
    213,909x = 36,756,957,327.30
  5. Step 5: Solve for x
    x = 36,756,957,327.30/213,909
  6. Step 6: Final answer
    x = 171,834.55

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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.