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Finding the Fourth Proportional to 85,309.20, 127,973.40 and 26,144.40

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Solution

The fourth proportional to 85,309.20, 127,973.40 and 26,144.40 is: 39,219.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,309.20 : 127,973.40 = 26,144.40 : x
  2. Step 2: Convert to fraction form
    85,309.20/127,973.40 = 26,144.40/x
  3. Step 3: Cross multiply
    85,309.20x = 127,973.40 × 26,144.40
  4. Step 4: Simplify right side
    85,309.20x = 3,345,787,758.96
  5. Step 5: Solve for x
    x = 3,345,787,758.96/85,309.20
  6. Step 6: Final answer
    x = 39,219.54

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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.