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Finding the Fourth Proportional to 99,973.30, 137,963.43 and 54,651.82

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Solution

The fourth proportional to 99,973.30, 137,963.43 and 54,651.82 is: 75,419.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,973.30 : 137,963.43 = 54,651.82 : x
  2. Step 2: Convert to fraction form
    99,973.30/137,963.43 = 54,651.82/x
  3. Step 3: Cross multiply
    99,973.30x = 137,963.43 × 54,651.82
  4. Step 4: Simplify right side
    99,973.30x = 7,539,952,542.94
  5. Step 5: Solve for x
    x = 7,539,952,542.94/99,973.30
  6. Step 6: Final answer
    x = 75,419.66

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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.