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Finding the Fourth Proportional to 216,884.11, 299,300.02 and 121,390.80

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Solution

The fourth proportional to 216,884.11, 299,300.02 and 121,390.80 is: 167,519.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,884.11 : 299,300.02 = 121,390.80 : x
  2. Step 2: Convert to fraction form
    216,884.11/299,300.02 = 121,390.80/x
  3. Step 3: Cross multiply
    216,884.11x = 299,300.02 × 121,390.80
  4. Step 4: Simplify right side
    216,884.11x = 36,332,268,867.82
  5. Step 5: Solve for x
    x = 36,332,268,867.82/216,884.11
  6. Step 6: Final answer
    x = 167,519.28

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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.