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Finding the Fourth Proportional to 115,253.89, 172,839.31 and 48,699.21

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Solution

The fourth proportional to 115,253.89, 172,839.31 and 48,699.21 is: 73,031.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,253.89 : 172,839.31 = 48,699.21 : x
  2. Step 2: Convert to fraction form
    115,253.89/172,839.31 = 48,699.21/x
  3. Step 3: Cross multiply
    115,253.89x = 172,839.31 × 48,699.21
  4. Step 4: Simplify right side
    115,253.89x = 8,417,137,853.95
  5. Step 5: Solve for x
    x = 8,417,137,853.95/115,253.89
  6. Step 6: Final answer
    x = 73,031.27

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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.