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Finding the Fourth Proportional to 85,396.21, 117,831.24 and 59,980.23

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Solution

The fourth proportional to 85,396.21, 117,831.24 and 59,980.23 is: 82,761.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,396.21 : 117,831.24 = 59,980.23 : x
  2. Step 2: Convert to fraction form
    85,396.21/117,831.24 = 59,980.23/x
  3. Step 3: Cross multiply
    85,396.21x = 117,831.24 × 59,980.23
  4. Step 4: Simplify right side
    85,396.21x = 7,067,544,876.39
  5. Step 5: Solve for x
    x = 7,067,544,876.39/85,396.21
  6. Step 6: Final answer
    x = 82,761.81

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Double scale
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1.5x scale

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.