Home / 117,183-161,721.18-72,479.64

Finding the Fourth Proportional to 117,183, 161,721.18 and 72,479.64

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Solution

The fourth proportional to 117,183, 161,721.18 and 72,479.64 is: 100,027.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,183 : 161,721.18 = 72,479.64 : x
  2. Step 2: Convert to fraction form
    117,183/161,721.18 = 72,479.64/x
  3. Step 3: Cross multiply
    117,183x = 161,721.18 × 72,479.64
  4. Step 4: Simplify right side
    117,183x = 11,721,492,906.78
  5. Step 5: Solve for x
    x = 11,721,492,906.78/117,183
  6. Step 6: Final answer
    x = 100,027.25

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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.