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Finding the Fourth Proportional to 78,643.22, 108,530.70 and 44,654.86

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Solution

The fourth proportional to 78,643.22, 108,530.70 and 44,654.86 is: 61,625.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,643.22 : 108,530.70 = 44,654.86 : x
  2. Step 2: Convert to fraction form
    78,643.22/108,530.70 = 44,654.86/x
  3. Step 3: Cross multiply
    78,643.22x = 108,530.70 × 44,654.86
  4. Step 4: Simplify right side
    78,643.22x = 4,846,422,448.27
  5. Step 5: Solve for x
    x = 4,846,422,448.27/78,643.22
  6. Step 6: Final answer
    x = 61,625.44

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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.