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Finding the Fourth Proportional to 52,791.90, 72,853.88 and 28,918.61

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Solution

The fourth proportional to 52,791.90, 72,853.88 and 28,918.61 is: 39,908.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,791.90 : 72,853.88 = 28,918.61 : x
  2. Step 2: Convert to fraction form
    52,791.90/72,853.88 = 28,918.61/x
  3. Step 3: Cross multiply
    52,791.90x = 72,853.88 × 28,918.61
  4. Step 4: Simplify right side
    52,791.90x = 2,106,832,433.84
  5. Step 5: Solve for x
    x = 2,106,832,433.84/52,791.90
  6. Step 6: Final answer
    x = 39,908.25

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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.