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Finding the Fourth Proportional to 85,159.76, 127,739.64 and 25,995.76

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Solution

The fourth proportional to 85,159.76, 127,739.64 and 25,995.76 is: 38,993.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,159.76 : 127,739.64 = 25,995.76 : x
  2. Step 2: Convert to fraction form
    85,159.76/127,739.64 = 25,995.76/x
  3. Step 3: Cross multiply
    85,159.76x = 127,739.64 × 25,995.76
  4. Step 4: Simplify right side
    85,159.76x = 3,320,689,023.93
  5. Step 5: Solve for x
    x = 3,320,689,023.93/85,159.76
  6. Step 6: Final answer
    x = 38,993.64

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Double scale
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Similar ratio
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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.