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Finding the Fourth Proportional to 118,112.99, 163,062.25 and 81,867.11

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Solution

The fourth proportional to 118,112.99, 163,062.25 and 81,867.11 is: 113,022.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,112.99 : 163,062.25 = 81,867.11 : x
  2. Step 2: Convert to fraction form
    118,112.99/163,062.25 = 81,867.11/x
  3. Step 3: Cross multiply
    118,112.99x = 163,062.25 × 81,867.11
  4. Step 4: Simplify right side
    118,112.99x = 13,349,434,137.62
  5. Step 5: Solve for x
    x = 13,349,434,137.62/118,112.99
  6. Step 6: Final answer
    x = 113,022.58

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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.