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Finding the Fourth Proportional to 92,855.60, 127,647.38 and 79,887.20

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Solution

The fourth proportional to 92,855.60, 127,647.38 and 79,887.20 is: 109,819.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,855.60 : 127,647.38 = 79,887.20 : x
  2. Step 2: Convert to fraction form
    92,855.60/127,647.38 = 79,887.20/x
  3. Step 3: Cross multiply
    92,855.60x = 127,647.38 × 79,887.20
  4. Step 4: Simplify right side
    92,855.60x = 10,197,391,575.82
  5. Step 5: Solve for x
    x = 10,197,391,575.82/92,855.60
  6. Step 6: Final answer
    x = 109,819.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.