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Finding the Fourth Proportional to 124,996.87, 172,499.12 and 71,290.63

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Solution

The fourth proportional to 124,996.87, 172,499.12 and 71,290.63 is: 98,383.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,996.87 : 172,499.12 = 71,290.63 : x
  2. Step 2: Convert to fraction form
    124,996.87/172,499.12 = 71,290.63/x
  3. Step 3: Cross multiply
    124,996.87x = 172,499.12 × 71,290.63
  4. Step 4: Simplify right side
    124,996.87x = 12,297,570,939.25
  5. Step 5: Solve for x
    x = 12,297,570,939.25/124,996.87
  6. Step 6: Final answer
    x = 98,383.03

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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.