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Finding the Fourth Proportional to 216,684.78, 299,023.27 and 121,191.40

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Solution

The fourth proportional to 216,684.78, 299,023.27 and 121,191.40 is: 167,243.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,684.78 : 299,023.27 = 121,191.40 : x
  2. Step 2: Convert to fraction form
    216,684.78/299,023.27 = 121,191.40/x
  3. Step 3: Cross multiply
    216,684.78x = 299,023.27 × 121,191.40
  4. Step 4: Simplify right side
    216,684.78x = 36,239,048,723.88
  5. Step 5: Solve for x
    x = 36,239,048,723.88/216,684.78
  6. Step 6: Final answer
    x = 167,243.17

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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.