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Finding the Fourth Proportional to 52,778.88, 72,835.64 and 28,907.78

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Solution

The fourth proportional to 52,778.88, 72,835.64 and 28,907.78 is: 39,893.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,778.88 : 72,835.64 = 28,907.78 : x
  2. Step 2: Convert to fraction form
    52,778.88/72,835.64 = 28,907.78/x
  3. Step 3: Cross multiply
    52,778.88x = 72,835.64 × 28,907.78
  4. Step 4: Simplify right side
    52,778.88x = 2,105,516,220.83
  5. Step 5: Solve for x
    x = 2,105,516,220.83/52,778.88
  6. Step 6: Final answer
    x = 39,893.16

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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.