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Finding the Fourth Proportional to 112,508, 155,388.60 and 76,635.80

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Solution

The fourth proportional to 112,508, 155,388.60 and 76,635.80 is: 105,844.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,508 : 155,388.60 = 76,635.80 : x
  2. Step 2: Convert to fraction form
    112,508/155,388.60 = 76,635.80/x
  3. Step 3: Cross multiply
    112,508x = 155,388.60 × 76,635.80
  4. Step 4: Simplify right side
    112,508x = 11,908,329,671.88
  5. Step 5: Solve for x
    x = 11,908,329,671.88/112,508
  6. Step 6: Final answer
    x = 105,844.29

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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.