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Finding the Fourth Proportional to 216,783.81, 299,176.34 and 121,299.39

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Solution

The fourth proportional to 216,783.81, 299,176.34 and 121,299.39 is: 167,401.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,783.81 : 299,176.34 = 121,299.39 : x
  2. Step 2: Convert to fraction form
    216,783.81/299,176.34 = 121,299.39/x
  3. Step 3: Cross multiply
    216,783.81x = 299,176.34 × 121,299.39
  4. Step 4: Simplify right side
    216,783.81x = 36,289,906,937.94
  5. Step 5: Solve for x
    x = 36,289,906,937.94/216,783.81
  6. Step 6: Final answer
    x = 167,401.37

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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.