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Finding the Fourth Proportional to 56,894.40, 78,503.04 and 31,739.04

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Solution

The fourth proportional to 56,894.40, 78,503.04 and 31,739.04 is: 43,793.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,894.40 : 78,503.04 = 31,739.04 : x
  2. Step 2: Convert to fraction form
    56,894.40/78,503.04 = 31,739.04/x
  3. Step 3: Cross multiply
    56,894.40x = 78,503.04 × 31,739.04
  4. Step 4: Simplify right side
    56,894.40x = 2,491,611,126.68
  5. Step 5: Solve for x
    x = 2,491,611,126.68/56,894.40
  6. Step 6: Final answer
    x = 43,793.61

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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.