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Finding the Fourth Proportional to 216,883.11, 299,298.64 and 121,389.80

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Solution

The fourth proportional to 216,883.11, 299,298.64 and 121,389.80 is: 167,517.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,883.11 : 299,298.64 = 121,389.80 : x
  2. Step 2: Convert to fraction form
    216,883.11/299,298.64 = 121,389.80/x
  3. Step 3: Cross multiply
    216,883.11x = 299,298.64 × 121,389.80
  4. Step 4: Simplify right side
    216,883.11x = 36,331,802,049.87
  5. Step 5: Solve for x
    x = 36,331,802,049.87/216,883.11
  6. Step 6: Final answer
    x = 167,517.90

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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.