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Finding the Fourth Proportional to 81,860.91, 112,907.61 and 56,375.37

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Solution

The fourth proportional to 81,860.91, 112,907.61 and 56,375.37 is: 77,756.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,860.91 : 112,907.61 = 56,375.37 : x
  2. Step 2: Convert to fraction form
    81,860.91/112,907.61 = 56,375.37/x
  3. Step 3: Cross multiply
    81,860.91x = 112,907.61 × 56,375.37
  4. Step 4: Simplify right side
    81,860.91x = 6,365,208,289.57
  5. Step 5: Solve for x
    x = 6,365,208,289.57/81,860.91
  6. Step 6: Final answer
    x = 77,756.38

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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.