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Finding the Fourth Proportional to 103,672.84, 143,137.38 and 79,757.32

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Solution

The fourth proportional to 103,672.84, 143,137.38 and 79,757.32 is: 110,118.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,672.84 : 143,137.38 = 79,757.32 : x
  2. Step 2: Convert to fraction form
    103,672.84/143,137.38 = 79,757.32/x
  3. Step 3: Cross multiply
    103,672.84x = 143,137.38 × 79,757.32
  4. Step 4: Simplify right side
    103,672.84x = 11,416,253,820.62
  5. Step 5: Solve for x
    x = 11,416,253,820.62/103,672.84
  6. Step 6: Final answer
    x = 110,118.08

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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.