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Finding the Fourth Proportional to 85,103.90, 127,655.85 and 79,855.10

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Solution

The fourth proportional to 85,103.90, 127,655.85 and 79,855.10 is: 119,782.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,103.90 : 127,655.85 = 79,855.10 : x
  2. Step 2: Convert to fraction form
    85,103.90/127,655.85 = 79,855.10/x
  3. Step 3: Cross multiply
    85,103.90x = 127,655.85 × 79,855.10
  4. Step 4: Simplify right side
    85,103.90x = 10,193,970,667.34
  5. Step 5: Solve for x
    x = 10,193,970,667.34/85,103.90
  6. Step 6: Final answer
    x = 119,782.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.