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Finding the Fourth Proportional to 52,791.70, 72,852.58 and 28,918.47

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Solution

The fourth proportional to 52,791.70, 72,852.58 and 28,918.47 is: 39,907.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,791.70 : 72,852.58 = 28,918.47 : x
  2. Step 2: Convert to fraction form
    52,791.70/72,852.58 = 28,918.47/x
  3. Step 3: Cross multiply
    52,791.70x = 72,852.58 × 28,918.47
  4. Step 4: Simplify right side
    52,791.70x = 2,106,785,149.15
  5. Step 5: Solve for x
    x = 2,106,785,149.15/52,791.70
  6. Step 6: Final answer
    x = 39,907.51

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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.