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Finding the Fourth Proportional to 56,907.60, 78,536.84 and 31,418.88

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Solution

The fourth proportional to 56,907.60, 78,536.84 and 31,418.88 is: 43,360.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,907.60 : 78,536.84 = 31,418.88 : x
  2. Step 2: Convert to fraction form
    56,907.60/78,536.84 = 31,418.88/x
  3. Step 3: Cross multiply
    56,907.60x = 78,536.84 × 31,418.88
  4. Step 4: Simplify right side
    56,907.60x = 2,467,539,551.54
  5. Step 5: Solve for x
    x = 2,467,539,551.54/56,907.60
  6. Step 6: Final answer
    x = 43,360.46

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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.