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Finding the Fourth Proportional to 78,653.52, 108,435.72 and 76,207.44

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Solution

The fourth proportional to 78,653.52, 108,435.72 and 76,207.44 is: 105,063.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,653.52 : 108,435.72 = 76,207.44 : x
  2. Step 2: Convert to fraction form
    78,653.52/108,435.72 = 76,207.44/x
  3. Step 3: Cross multiply
    78,653.52x = 108,435.72 × 76,207.44
  4. Step 4: Simplify right side
    78,653.52x = 8,263,608,625.76
  5. Step 5: Solve for x
    x = 8,263,608,625.76/78,653.52
  6. Step 6: Final answer
    x = 105,063.43

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1.5x scale

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.